Matemática e estatística

0-9

• 13th Month Pay — Non-taxable Cap (₱90,000)
  Kalkulahin ang di-natatayang bahagi (hanggang ₱90,000) at ang pasok sa buwis na bahagi ng 13th month at iba pang benepisyo. Edukasyonal lamang.
• 2D Graphing Calculator — plot up to 3 functions with intersection & extrema steps
  Plot up to three functions, detect x-intercepts, intersections, and extrema via bisection and numeric derivatives. Includes zoom, pan, shareable URLs, and transparent step logs.

A

• Aleatórios e loterias: selecionadores, dados, probabilidade | CalcBE
  Encontre rapidamente a ferramenta aleatória certa: seletor aleatório ponderado, seletor aleatório, ferramentas de dados e calculadoras de probabilidade. Somente navegador, sem login.
• Anggaran PCB（Potongan Cukai Bulanan）— pendidikan
  Anggarkan PCB bulanan berdasarkan gaji kasar dan kadar anggaran (%). Untuk pendidikan/rujukan; kadar sebenar tertakluk kepada jadual LHDN.

B

• BTW 21% — netto ↔ bruto（snelle omzetting）
  Reken prijs netto en bruto om bij BTW 21%. Deel resultaat met een link. Afronding: dichtstbijzijnd / omhoog / omlaag.
• BTW 9% — netto ↔ bruto（snelle omzetting）
  Reken prijs netto en bruto om bij BTW 9%. Deel resultaat met een link. Afronding: dichtstbijzijnd / omhoog / omlaag.
• Buffer pH (Henderson–Hasselbalch) with steps — design, additions, capacity
  Compute buffer pH with the Henderson–Hasselbalch equation, design mixtures for a target pH, and model strong acid/base additions with buffer capacity and step-by-step logs.

C

• Calculadora científica (Trigonometria, logaritmos e modos de ângulo)
  Resolva funções trigonométricas, logaritmos, exponenciais e fatoriais. Altere entre graus e radianos e compartilhe pela URL.
• Calculadora de BMR e TDEE (calorias diárias)
  Estime sua taxa metabólica basal e o gasto energético diário total usando a equação de Mifflin-St Jeor.
• Calculadora de equações quadráticas (discriminante e vértice)
  Se a = 0 a equação é linear. O resolutor alterna automaticamente para bx + c = 0 e apresenta o resultado correspondente.
• Calculadora de fatorização em primos até 2^53−1 | CalcBE
  Fatorize inteiros positivos até 2^53−1 em primos e veja expoentes, número de divisores e se o valor é primo ou composto. Útil para trabalhos de escola, preparação de exames e verificações rápidas diretamente no navega…
• Calculadora de frações (simplificar, números mistos, denominador comum)
  Informe frações impróprias ou mistas, escolha a operação desejada e veja instantaneamente o resultado simplificado, a forma mista e a aproximação decimal, além.
• Calculadora de geometria 2D (área e perímetro: retângulo, círculo, triângulo, trapézio, polígono regular)
  Calcule rapidamente a área e o perímetro de retângulos, círculos, triângulos, trapézios e polígonos regulares.
• Calculadora de geometria 3D (esfera, cilindro, cone, prisma)
  Calcule o volume e a área de superfície de esferas, cilindros, cones, prismas retangulares e prismas regulares.
• Calculadora de MDC e MMC para listas de inteiros | CalcBE
  Separe até 32 inteiros por vírgulas ou espaços para calcular o máximo divisor comum (MDC) e o mínimo múltiplo comum (MMC) da lista. Ajuda em frações, calendários e divisão de recursos.
• Calculadora de média e desvio padrão (população vs amostra)
  Cole ou digite seu conjunto numérico para obter contagem, média, variância e desvio padrão nas fórmulas de população (N) e amostra (N-1).
• Calculadora de números complexos — a+bi ↔ forma polar com passos
  Converta entre a+bi e r∠θ, faça operações com números complexos, potências inteiras e todas as raízes de ordem n, com plano de Argand interativo e passos detalhados.
• Calculadora de percentagem (X% de Y / quanto % / aumento / redução) | CalcBE
  Calcule X% de Y, quanto X representa de Y em percentagem, e também aumento ou redução percentual. Link partilhável para rever os mesmos valores.
• Calculadora de propagação de erro — somas, produtos, potências e funções gerais (com passos)
  Propague incertezas com gradiente×covariância, matriz de correlação e validação Monte Carlo. Inclui modelos para somas, produtos, potências e um parser seguro para funções gerais.
• Calculadora de reagente limitante — rendimento teórico, % e pureza | CalcBE
  Equilibre a reação (auto ou manual), converta g/mol/M×L com correção de pureza e veja reagente limitante, rendimento teórico, % de rendimento e pureza passo a passo. CSV e URL partilhável.
• Calculadora padrão (histórico e memória)
  Execute as quatro operações com parênteses, porcentagem, memória e fita de histórico. Todos os controles funcionam com mouse, toque ou teclado.
• Calculadoras de data e hora: dias entre, dias úteis, fusos horários | CalcBE
  Calcule dias entre datas, adicione/subtraia tempo, conte dias úteis e converta fusos horários. Somente navegador.
• Calculadoras de empréstimos e hipotecas: pagamento, cronograma, acessibilidade | CalcBE
  Estime pagamentos, compare cronogramas de amortização e verifique a acessibilidade (DTI) com calculadoras de empréstimos e hipotecas somente para navegador.
• Calculadoras de impostos: IVA, GST, imposto de renda, líquido ↔ bruto | CalcBE
  Calculadoras rápidas de impostos para IVA/GST, conversões líquidas↔brutas e imposto de renda. Somente navegador, sem inscrição.
• CI & Hypothesis Test Wizard (Means & Proportions)
  Build confidence intervals and hypothesis tests for means and proportions. Supports Welch, paired, Wilson, Newcombe, and visualises p-values.
• Conic Sections Explorer — standard form, focus, directrix & eccentricity (with steps)
  Classify a general quadratic, rotate to eliminate xy, complete the square to standard form, and visualize focus, directrix, and asymptotes. LaTeX/URL/CSV ready.
• Conversor de bases e bitwise (bin/oct/dec/hex) | CalcBE
  Converta qualquer valor entre binário, octal, decimal e hexadecimal enquanto aplica operações bitwise e deslocamentos comuns.
• Conversor de taxas APR↔EAR (mensal e diária) | CalcBE
  Converta a taxa nominal anual (APR) em taxas mensal, diária e efetiva anual (EAR), ou faça o caminho inverso a partir de uma taxa periódica para comparar empréstimos, cartões de crédito e aplicações. Calculadora onlin…
• Coordinate Geometry Toolkit — distance, midpoint, slope, lines & circles (with steps)
  Compute distance, midpoint, slope, line equations, circles, and intersections with full working shown beside the results and a live coordinate plane diagram.
• Curva de titulação ácido–base (com passos) — pH vs volume | CalcBE
  Trace curvas de titulação para ácidos/bases fortes ou fracas, destaque zonas tampão e pontos de equivalência e reveja os passos Henderson–Hasselbalch ou hidrólise com URL partilhável e CSV.

D

• Descriptive Statistics + Box Plot & Histogram (with steps)
  Paste a dataset or upload CSV/TSV to review descriptive statistics, histogram, box plot, outlier counts, trimmed mean, CSV export, LaTeX summary, and documented steps.
• Differentiation Calculator (steps, tangents, numeric)
  Compute symbolic and numeric derivatives for single-variable, parametric, implicit, and partial derivatives. See Richardson extrapolation steps and tangent lines instantly for teaching and study.
• Dimensional analysis & unit consistency checker (with steps)
  Parse compound units, verify equation consistency, and generate Buckingham Π groups with step-by-step logs, CSV export, and shareable URLs.
• Distributions Pack Calculator — Binomial, Poisson, Student's t, Chi-square with Steps
  Compute PMF/PDF, CDF, quantiles, and exact confidence intervals for binomial, Poisson, Student's t, and chi-square distributions with step-by-step explanations, graphs, CSV, LaTeX, and shareable URLs.
• Divisão e multiplicação em coluna (com etapas)
  Mostra cada etapa. Detecta decimais periódicos; copia LaTeX; compartilha por URL.

E

• Eigenvalues & Eigenvectors (2x2, 3x3) — with steps
  Compute eigenvalues, eigenvectors, residuals, and multiplicities for 2x2 and 3x3 matrices with analytic, rational-root, and QR iteration explanations.
• Empirical & molecular formula calculator (with steps) — percent composition, combustion analysis, hydrates
  Four-mode chemistry calculator extracts empirical and molecular formulas from percent composition, combustion analysis, and hydrate data, with detailed How it's calculated logs, CSV export, and shareable URLs.
• Estatísticas de dados – probabilidades de sucesso e calculadora de distribuição | CalcBE
  Calcule probabilidades de sucesso, distribuições exatas ou simuladas, média/DP e modos superiores para notação de dados NdS +/- K. Alterna automaticamente Exato/Sim, mostra histogramas e compartilha como texto, PNG ou…
• Explorador de transformações de funções — y = a·f(b(x−h)) + v
  Visualize translações, alongamentos e reflexões. Modo docente, links compartilháveis e exportação PNG.

F

• Fatoração prima | Miller–Rabin e Pollard rho
  Fatora inteiros com Miller–Rabin, Pollard rho e primos pequenos; forma canónica, passos e τ(n)·σ(n)·φ(n)·μ(n)·rad(n).
• Ferramentas de estudo e sala de aula: planilhas, papel milimetrado, GPA | CalcBE
  Ferramentas prontas para sala de aula: gerador de planilhas, papel milimetrado, gráficos rápidos, além de calculadoras de GPA e estatísticas. Somente navegador.
• Ferramentas de geometria e gráfico: triângulos, vetores, 2D/3D | CalcBE
  Resolva triângulos, trabalhe com vetores e use ajudantes gráficos, como papel milimetrado e retas numéricas. Ferramentas de geometria somente para navegador.
• First-order ODEs (Separable & Linear) + Direction Field — with steps
  Visualise separable and linear first-order ODEs with slope fields, Simpson integrals, integrating factors, numeric inversion, RK4 checks, CSV export, and shareable URLs.
• Fraction Simplifier & Mixed Number Converter (Steps & Visuals)
  Reduce any fraction, convert between improper and mixed numbers, and review Euclidean GCD steps with pie and number line visuals for lessons.

G

• GCD & LCM Calculator (with Steps) — Extended Euclid, Fraction/Ratio Simplifier
  Trace every a = q·b + r step, explore extended Euclid back substitution, simplify fractions or ratios, factor numbers, and share LaTeX-ready results with teacher notes.
• GPA ↔ Percentagem (educativo)
  Converta entre GPA e percentagem com fórmulas de exemplo (p.ex., % = 9,5 × GPA ou % = 10 × GPA). As instituições diferem — confirme a regra aplicável.

I

• Inequality Solver (1 & 2 Variable) — Steps & Graphs
  Solve linear, compound, absolute value, quadratic, and rational inequalities with shareable steps, plus half-plane and system visuals that shade the feasible region.
• Integration Calculator (numeric + steps)
  Compute definite integrals with trapezoid, Simpson, adaptive Simpson, Romberg, Gauss-Legendre, and Monte Carlo while logging nodes, weights, and error estimates. Includes basic indefinite forms, applications, and prob…
• Invoice: Net ↔ Gross (VAT isinama/inalis)
  Magpalit ng net at gross sa invoice sa pamamagitan ng VAT rate (hal. 12%). Piliin ang rounding at currency. Shareable URL.
• IVA 13% — líquido ↔ bruto
  Converta rapidamente entre preço líquido e bruto a 13% de IVA. Arredondamento e partilha por link.
• IVA 23% — líquido ↔ bruto
  Converta rapidamente entre preço líquido e bruto a 23% de IVA. Arredondamento: ao mais próximo / para cima / para baixo. Partilha por link.
• IVA 6% — líquido ↔ bruto
  Converta rapidamente entre preço líquido e bruto a 6% de IVA. Arredondamento e partilha por link.
• IVA em Portugal — atalhos por taxa (23% / 13% / 6%)
  Escolha rapidamente a taxa de IVA (23% / 13% / 6%) para calcular líquido ↔ bruto. Inclui link para a calculadora de IVA geral.

K

• Kinematics: SUVAT / Projectile / Free Fall (steps)
  Solve SUVAT unknowns, 2D projectile motion and free-fall on one page. Get step-by-step logs, quadratic root reasoning, shareable URLs, plots, and teacher notes.

L

• Lakh/Crore ↔ Western (ตัวช่วยแปลงรูปแบบตัวเลขอินเดีย)
  แปลงตัวเลขระหว่างรูปแบบ Western (1,000,000) และรูปแบบอินเดีย (10,00,000; หน่วย Lakh/Crore) พร้อมแสดงค่าเป็น Lakh/Crore และจัดรูปแบบตามกลุ่มหลักแบบอินเดีย
• Lens & Mirror Equation — with steps and ray diagram
  Compute image distance, magnification, and principal rays for thin lenses or mirrors with a live How it's calculated log, CSV export, and shareable links.
• Limits Explorer — One-sided limits & numeric L'Hôpital
  Diagnose indeterminate forms, apply numeric L'Hôpital, sample one-sided limits, and visualise the graph near the approach point. Shareable URL, LaTeX copy, and CSV export included.
• Linear Regression & Correlation — Scatter, OLS/WLS, R² (with steps)
  Paste x,y[,w] or upload a CSV to fit OLS, WLS, or Theil–Sen. Visualize the regression line with 95% confidence/prediction bands, residuals, t/F tests, CSV export, LaTeX, and a transparent step log on one page.
• Linear Systems Solver with RREF Steps (2×2 & 3×3)
  Reduce 2×2 and 3×3 linear systems with Gaussian or Gauss-Jordan elimination, log every row operation, keep exact fractional answers, and share matrices in one click.
• Log Laws Transformer (with steps) — expand, condense, change of base
  Expand, condense, and evaluate logarithms with shareable steps. Convert between bases (log10 and ln), copy LaTeX, and guide lessons with teacher mode.

M

• Matrix Calculator — RREF / Solve Ax=b / Inverse / Determinant (with steps)
  Compute RREF, solve Ax=b, find the inverse, determinant, rank, null space, row and column spaces with detailed elimination logs. Supports exact fractions, decimals, shareable URLs, and LaTeX export.
• Modular Arithmetic Suite — Extended GCD / Inverse / Fast Power / CRT (step-by-step)
  Compute extended GCD, modular inverses, fast power, CRT and linear congruences with BigInt precision. Every iteration appears in How it’s calculated, plus CSV export and shareable URLs for teaching.

N

• Normal Distribution Calculator — PDF/CDF/Quantile & Z-Score
  Enter a mean and standard deviation to compute PDF, CDF (one- and two-tailed), quantiles, interval probabilities, and z-scores with step-by-step explanations, a shaded normal curve, shareable URLs, and teacher notes.
• Numerieke notatie：Nederlandse ↔ Westerse（1.234,56 ↔ 1,234.56）
  Zet getallen om tussen Nederlandse notatie（1.234,56）en Westerse（1,234.56）。Deel een link met de huidige waarde.

P

• Partial Fractions Calculator with Steps
  Decompose rational functions into partial fractions with polynomial long division, Durand-Kerner factorisation, Gaussian elimination, LaTeX, CSV, and shareable URLs.
• Partial pressure & gas mixing (with steps) — Dalton's law, two-tank mixing, wet gas, van der Waals
  Run Dalton’s law, two-tank isothermal mixing, and wet gas corrections with step-by-step logs. Compare van der Waals pressure, export CSV results, and share every setup by URL.
• Pascal's Triangle & Binomial Expansion (with steps)
  Generate Pascal rows, combinations, and binomial expansions with BigInt accuracy. Watch How it's calculated, export CSV logs, inspect row identities, and share lesson-ready URLs.
• Permutation & Combination Calculator (nPr, nCr) — with Steps
  Compute permutations nPr, combinations nCr, and factorial n! with exact BigInt results, scientific-notation approximations, step logs, teacher notes, and shareable URLs.
• Prime Factorization with Steps & Factor Tree | τ(n), σ(n), φ(n)
  Factor any integer into primes, see every trial division step, compute τ(n), σ(n), φ(n), and draw the factor tree. Optional second integer shows gcd/lcm via exponents.
• Probability Simulator — coin, dice, roulette (theory vs empirical, with steps)
  Deterministic coin, dice, and roulette simulations compare theory vs empirical results, surface Wilson 95% confidence intervals, convergence charts, CSV/LaTeX exports, and full How it's calculated steps.

R

• Ratio, Proportion & Percentage Solver (Step-by-Step)
  Simplify ratios, solve proportions, split totals, compare percentages and convert map scales with transparent step-by-step working, teacher mode, shareable links, and LaTeX output.
• RC / RL / RLC Calculator — time constant, cutoff, resonance & phase (with steps)
  Analyse RC, RL, and RLC networks with step-by-step formulas. Compute time constants, divider gain, resonance, and equivalent series or parallel values with shareable results.
• Rolo de dados para rolos d4-d100 com compartilhamento PNG | CalcBE
  Role d4-d100 com botões rápidos ou notação como 2d6+3, veja totais e detalhamentos, mantenha o histórico e compartilhe texto ou cartões PNG diretamente do seu navegador.

S

• Sampling & Bootstrap — CLT Explorer (with steps)
  Simulate uniform, normal, exponential, and Bernoulli samples with a seeded LCG, compute mean/median/proportion estimates, bootstrap percentile and t/normal CIs, and visualise CLT histograms with How it's calculated st…
• Sequences & Series (Arithmetic / Geometric) — terms & sums with steps
  Compute arithmetic and geometric sequences with step-by-step logs: nth terms, partial sums, solving for n or k, two-point inference, and table generation with shareable outputs.
• Simple Harmonic Motion (SHM) simulator — with steps and energy
  Simulate spring-mass simple harmonic motion with analytic, Euler-Cromer, or RK4 steps, inspect omega, period, energy, shareable logs, plots, and CSV exports.
• Simplificador de raízes com árvore e passos | CalcBE
  Simplifique √n para a√b com árvore de fatores, pares e passos claros. Calcule decimais com limites por quadrados e copie LaTeX ou exporte SVG.
• Solucionador de Triângulos — Lei dos Senos/Cossenos (SSA ambíguo) | CalcBE
  Resolva triângulos com SSS, SAS, ASA/AAS e o caso ambíguo SSA. Veja fórmulas passo a passo, alterne a saída em graus/radianos, escolha casas decimais e visualize um diagrama anotado.
• Solucionador quadrático e polinomial com etapas
  Mostra raízes exatas e decimais, discriminante, fatoração, completar o quadrado e gráfico da parábola. Modo polinomial (≤3) com candidatos racionais e divisão sintética.
• Solver de sistemas lineares (2×2 / 3×3)
  Resolva sistemas lineares 2×2 e 3×3 com eliminação de Gauss (RREF), classifique o tipo de solução, veja a forma paramétrica, os resíduos, os passos de eliminação e a regra de Cramer para 2×2.
• Somatórios de Riemann | esquerda/direita/médio/trapézio/Simpson
  Trace f(x) e compare as aproximações esquerda/direita/ponto médio/trapézio/Simpson. Exportação CSV/LaTeX e link compartilhável.

T

• Taxa de esforço (DTI)
  Introduza o rendimento mensal bruto e as despesas mensais de dívida para calcular a taxa de esforço (DTI). Resultado educativo; não é aconselhamento financeiro.
• Taylor & Maclaurin Series — with steps and graphs
  Generate Taylor/Maclaurin P_n(x) with symbolic derivatives, fall back to least-squares fits when needed, and compare f and P_n on the same canvas. Includes error summaries, step-by-step logs, LaTeX, CSV, and shareable…
• Tópicos e coleções | CalcBE.com
  Navegue pelas coleções de tópicos CalcBE para encontrar rapidamente a calculadora ou ferramenta certa (sorteios aleatórios, PDFs, empréstimos, impostos e muito mais).
• Triangle Solver (SSS / SAS / ASA, Area & Circumradius)
  Select the known combination (three sides, two sides plus the included angle, or two angles plus the included side) and this tool will compute the remaining.
• TRPG verificação de dados – d20 vantagem/desvantagem e sucessos na parada de dados | CalcBE
  Execute verificações rápidas de d20 com vantagem ou desvantagem, compare com um DC e jogue paradas de dados para contar os sucessos diretamente em seu navegador. Mantenha as rolagens locais, salve o histórico e compar…
• Truth Table & Logic Evaluator — DNF/CNF Simplifier
  Build Boolean truth tables up to 10 variables, export canonical DNF/CNF, simplify with Karnaugh or Quine–McCluskey, and share CSV or URL with How it’s calculated steps.

U

• Unit Circle & Trig Explorer — amplitude, period & phase
  Explore y = A*f(bx+φ)+D for sine, cosine, and tangent. Sync the unit circle and graph, inspect amplitude, period, phase shift, export CSV samples, copy LaTeX, and share the exact state.

V

• Vector Calculator — dot/cross, projection, angle, area, triple (with steps)
  Compute norms, dot, cross (2D/3D), projection, angle, areas, and triple product with step-by-step logs. 2D diagram, shareable URL, LaTeX and CSV export.

W

• Withholding Tax Estimator (TRAIN) — Edukasyonal
  Tantyahin ang buwanang withholding mula sa buwanang nabubuwisang kita gamit ang TRAIN annual schedule (example). Edukasyonal lamang; maaaring mag-iba ang aktuwal na payroll.

#

• الحد الأدنى للسداد (بطاقة ائتمان)
  احسب عدد الأشهر وإجمالي الفائدة عند سداد الحد الأدنى لبطاقة الائتمان بناءً على الرصيد الحالي والنسبة السنوية والحد الأدنى (نسبة/مبلغ ثابت).
• تبدیل تومان ↔ ریال (ساده)
  تومان و ریال را با نسبت ثابت ۱ تومان = ۱۰ ریال تبدیل کنید. لینک نتیجه قابل اشتراک.
• บัตรเครดิต: จ่ายขั้นต่ำ (ประมาณการ เดือนและดอกเบี้ย)
  ป้อนยอดคงค้าง อัตราดอกเบี้ยต่อปี (APR) อัตราจ่ายขั้นต่ำ (%) และยอดขั้นต่ำ (บาท) เพื่อประมาณจำนวนเดือนและดอกเบี้ยรวม (เพื่อการศึกษา)
• แปลงพื้นที่ ที่ดิน: ไร่/งาน/ตารางวา ↔ m²
  แปลงพื้นที่ระหว่างไร่‑งาน‑ตารางวา และตารางเมตร: 1 ไร่ = 1600 m², 1 งาน = 400 m², 1 ตร.วา = 4 m² พร้อมลิงก์ผลลัพธ์ที่แชร์ได้