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New & featured
- Video Bitrate Calculator | File Size & Duration | CalcBE Use this video file size and bitrate calculator to estimate file size, required video bitrate, or recording time from Mbps, audio bitrate, duration...
- Torque, RPM & Power Calculator | hp, kW & N·m | CalcBE Calculate torque, RPM, horsepower, or kilowatts from the other two values. See N·m, lbf·ft, hp, PS, kW, rad/s, and clear formulas.
- Gear Ratio Calculator | Bike Speed & Gear Inches | CalcBE Calculate bicycle gear ratio, gear inches, development, speed from cadence, and simple gear-pair RPM and torque multipliers with clear formulas.
- Depth of Field Calculator | Hyperfocal distance | CalcBE Estimate focus near limit, far limit, total depth of field, and hyperfocal distance from lens settings.
- Print DPI Calculator | Effective PPI for photo prints | CalcBE Estimate effective PPI for a print size from image pixels. Compare horizontal, vertical, and target PPI before resizing or ordering a print.
- Inflation Calculator | CPI buying power by year | CalcBE Adjust an amount between years using U.S. CPI-U annual averages. See the start index, end index, price-level change, source, and finance disclaimer.
- Calories Burned Calculator | MET activity estimate | CalcBE Estimate calories burned from body weight, activity MET, and minutes. Switch kg/lb, see the MET formula, source, and health disclaimer.
- Pet Age Calculator | Dog and cat age in human years | CalcBE Estimate dog or cat age in human years and life stage from species, age, and dog size. Includes limits for breed, body size, and individual health...
- Roman Numeral Converter | Numbers to Roman and back | CalcBE Convert integers to Roman numerals and Roman numerals back to numbers. Validates standard notation from 1 to 3999 and shows the I, V, X, L, C, D, M...
- Epoch Converter | Quick Unix seconds, milliseconds, and ISO parser | CalcBE Quickly parse Unix epoch seconds, milliseconds, or ISO 8601 dates into UTC and browser local time. Use the full Unix Timestamp Converter for IANA...
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- Weighted Random Picker & Randomizer | Seeded Weighted Draws | CalcBE
Use this weighted random picker and randomizer to draw winners by weight, ratio, or raffle entries.
- Long Division Calculator with Steps | Remainders & Decimals | CalcBE
Calculate long division with steps. See the quotient, remainder, optional decimal answer, and each subtraction row.
- Business Days & Countdown Calculator | Skip Weekends | CalcBE
Count calendar or business days between two dates, exclude custom weekend patterns and holiday lists, and jump.
- Date Difference Calculator (days, business days, Y/M/D) | CalcBE
Compute days between dates, count business days and working hours, and see a year‑month‑day breakdown.
- Online Alarm Clock | Browser Alarm with Snooze | CalcBE
Set alarms in your browser without installing apps. Supports repeats, snooze, sound, notifications, and fullscreen.
- Loan & Mortgage Calculators: Payment, Schedule | CalcBE
Estimate payments, compare amortization schedules, and check affordability (DTI) with browser-only loan & mortgage calculators.