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- Loans & mortgages payments, affordability, schedules
- Date & time business days, time zones, planning
- Random & probability pickers, simulation, distributions
- Unit conversion measurement, temperature, currency
- Study & classroom math helpers, worksheets, learning tools
Standard calculator
Do quick four-function math here. Use the full version for history and memory.
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New tools
- Drawing tool Draw with brushes, shapes, and text, then save your work as an image.
- Monitor test Use solid colors, gradients, and test patterns to inspect your display and check for dead pixels.
- Mouse tester Check mouse buttons, scrolling, and pointer movement in your browser.
- Tournament bracket generator Create a bracket from your participant list and record match results.
- Word and character counter Count words, characters, and lines in your text.
- Keyboard tester Press keys to check their response and simultaneous key presses.
- Wheel spinner Add names or choices and spin the wheel to make a random selection.
- Typing speed test Measure typing speed and accuracy with timed tests from 15 seconds to 5 minutes.
- Exposure Triangle Calculator Calculate EV100, setting EV, exposure compensation stops, and equivalent aperture/shutter/ISO combinations for the exposure triangle.
- Multiplication Table Generator Generate printable multiplication tables for 1-12, 1-20, custom sizes, blank practice sheets, skip counting, and answer keys with a reproducible seed.
Recommended tools
- Weighted Random Picker & Randomizer
Use this weighted random picker and randomizer to draw winners by weight, ratio, or raffle entries.
- Long Division Calculator
Enter a dividend and divisor to get long division steps, quotient, remainder, decimal answer.
- Business Days & Countdown Calculator
Count calendar or business days between two dates, exclude custom weekend patterns and holiday lists.
- Date Difference Calculator (days, business days, Y/M/D)
Compute days between dates, count business days and working hours, and see a year‑month‑day breakdown.
- Online Alarm Clock
Set alarms in your browser without installing apps. Supports repeats, snooze, sound, notifications, and fullscreen.
- Loan & Mortgage Calculators: Payment, Schedule
Estimate payments, compare amortization schedules, and check affordability (DTI) with browser-only loan & mortgage calculators.