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Calculators — Free Online Tools

17 free calculators — calculate and convert units. No signup, no payment, no watermark.

All Calculators (17)

Basic Calculator
Add, subtract, multiply and divide with a clean keypad.
Unit Converter
Convert length, weight, area, volume, speed and time.
Scientific Calculator
Evaluate expressions with sin, cos, tan, log, sqrt and powers.
Percentage Calculator
Quickly calculate a percentage of any value.
BMI Calculator
Calculate your Body Mass Index and category from weight and height.
Age Calculator
Work out exact age in years, months, days and total days.
Loan Calculator
Calculate monthly loan payments, total cost and interest.
Date Difference Calculator
Count days, weeks, months and years between two dates.
Discount Calculator
Calculate savings and final price from a discount percentage.
Average & Mean Calculator
Find mean, median, sum, min and max of a list of numbers.
Tip Calculator
Calculate tips and split the bill between any number of people.
Tax & GST Calculator
Add or remove tax/GST from any amount instantly.
Dice Roller
Roll any number of dice with custom sides.
Coin Flipper
Flip a virtual coin and track heads and tails.
Random Decision Maker
Let chance pick from your list of options.
Random Color Generator
Generate random hex color swatches instantly.
Random List Picker
Randomly pick one or more items from a list.