Calculators
Runs locallyEveryday calculators that work instantly in your browser: percentage, BMI, mortgage, tip, compound interest, dates, units and more.
Percentage Calculator
Three everyday percentage questions, answered instantly: X% of Y, X is what % of Y, and % change.
BMI Calculator
Calculate your Body Mass Index in metric or imperial units, with WHO category feedback.
Date Difference Calculator
Calculate the exact difference between two dates in days, weeks, months and years — plus business days.
Random Number Generator
Generate random numbers in any range — unique or repeatable, one or in bulk.
Unit Converter
Convert length, weight, temperature, area, volume, speed and data-storage units instantly — all locally.
Scientific Calculator
Free online scientific calculator with trigonometry, logarithms, powers, factorials, memory keys and history.
Mortgage Calculator
Calculate monthly mortgage payments, total interest and a full amortization schedule — free, private, in-browser.
Age Calculator
Calculate exact age in years, months and days, plus totals, next birthday countdown and zodiac signs — free and private.
Tip Calculator
Split the bill and calculate tips in seconds — tip amount, total and per-person share. Free and private.
Compound Interest Calculator
See how your money grows with compound interest — contributions, compounding frequency and a yearly chart. Free and private.
Quick answers without spreadsheets or signups. Work out percentages and tips, plan a mortgage or compound interest, calculate BMI and age, convert units, compare dates or generate random numbers. Each calculator updates as you type and runs entirely on your device.