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CalcBE offers fast online calculators in English. Use free tools for finance, unit conversion, date & time and more, right in your browser.
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- Poker odds calculator - hands, outs, Hold'em odds | CalcBE Calculate poker hand probabilities, outs hit chances for turn/river, and Texas Hold'em hand distributions. Includes exact enumeration when fast, Mo...
- Coupon collector calculator – expected draws | CalcBE Calculate the coupon collector problem: expected draws to collect all, t50/t90/t99 completion counts, and P(T<=t). Switch to weighted rarities, run...
- Free QR code generator & scanner – create, verify, download | CalcBE Generate QR codes for URLs, text, Wi-Fi, contacts, phone, email, and SMS. Preview and validate instantly, then download PNG/SVG/PDF or share a sett...
- Lottery odds calculator – tiers & expected value | CalcBE Compute lottery odds for lotto-style games (main + bonus) and 2-pool games. Instantly see tier-by-tier probabilities, total win odds, odds inverse...
- Hypergeometric calculator (without replacement) | CalcBE Compute hypergeometric probabilities (without replacement): P(X=k), tails, and ranges. PMF chart/table, seeded simulation, share URL, and CSV.
- Inclusion–Exclusion — at least one & none | CalcBE Compute |A∪B∪…| (“at least one”) for 2–4 sets. For 2–3 sets you can input Venn regions (easy) or intersection sizes. Optionally add N to get “none”...
- Stars and bars calculator – count integer solutions | CalcBE Count the number of integer solutions to x1+…+xk=n with conditions (xi≥0, xi≥1, or xi≥ai), also known as combinations with repetition (multichoose)...
- Circular & necklace permutation calculator | CalcBE Compute circular permutations (rotation counted as the same) and necklace/bracelet permutations (rotation + reflection counted as the same) from n....
- Multiset permutation & anagram count calculator | CalcBE Count distinct permutations of strings with repeated characters using multinomial coefficients. Shows BigInt exact results, digit count, scientific...
- Repetition calculator – n^r & nHr (multichoose) with steps | CalcBE Calculate permutations with repetition (n^r) and combinations with repetition (nHr = C(n+r-1,r)) with Exact BigInt results or fast scientific-notat...
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- Concrete, Gravel & Mulch Calculator | Material Estimates | CalcBE
Estimate concrete volume and bag counts, gravel coverage and tons, and mulch bags with US or metric inputs plus a waste allowance. Results are informational only.
- Function Transformations Explorer (Translate, Scale, Reflect) | CalcBE
Adjust a, b, h and v in y = a·f(b(x−h)) + v to see how shifts, stretches and reflections change graphs, then compare the original and transformed curves side by side.
- Long division calculator – step-by-step quotient and remainder working | CalcBE
Enter a dividend and divisor to see the quotient, remainder, and a school-style long division layout with step-by-step explanations. Works with decimals and repeating decimals.