Free Online Calculators

Fast, accurate tools for math, finance, health, conversions, and more

112+ Calculators
9 Categories
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Math Calculators
10 tools
Financial Calculators
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Health & Fitness
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Conversion Tools
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Date & Time
8 tools
Text & Data Tools
10 tools
Science & Engineering
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Everyday & Misc
10 tools
Cryptography & Security
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Most Popular

Our most-used calculators

math
Percentage Calculator

Calculate percentages instantly: find percent of a number, percentage change, and what per...
financial
Mortgage Calculator

Calculate monthly mortgage payments, total interest, and amortization schedules. Compare f...
health-fitness
BMI Calculator

Calculate your Body Mass Index using height and weight. Get BMI category, healthy weight r...
conversion
Length Converter

Convert between length and distance units instantly: meters, feet, inches, miles, kilomete...
date-time
Age Calculator

Calculate your exact age in years, months, days, hours, and minutes. Find age on any date,...
text-data
Word Counter

Count words, characters, sentences, and paragraphs in your text. Check reading time, speak...
science-engineering
Ohm's Law Calculator

Calculate voltage, current, resistance, and power using Ohm's Law. Enter any two values to...
everyday
Tip Splitter

Split restaurant bills with custom tip among any number of people. Handle uneven splits, s...
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Recently Added

Fresh tools added to the collection

New
SHA-1 Hash Generator

Generate SHA-1 hashes from text or files. 160-bit hash calculator with deprecation warning...
New
HMAC Generator

Generate HMAC (Hash-based Message Authentication Code) with SHA-256, SHA-512, or SHA-1. Ve...
New
AES Encrypt / Decrypt

Encrypt and decrypt text with AES-256-GCM encryption using a password. Client-side encrypt...
New
UUID Generator

Generate random v4 UUIDs instantly. Bulk generate up to 100 UUIDs, validate UUID format, a...
New
Bitcoin Address Generator

Generate Bitcoin key pairs and addresses using pure JavaScript elliptic curve cryptography...
New
SHA-512 Hash Generator

Generate SHA-512 hashes from text or files online. 512-bit cryptographic hash calculator w...
New
MD5 Hash Generator

Generate MD5 hashes from text or files instantly. Free online MD5 checksum calculator with...
New
SHA-256 Hash Generator

Generate SHA-256 hashes from text or files online. Secure 256-bit cryptographic hash calcu...

All Calculators

Complete directory of every tool

Math Calculators
Percentage Calculator Fraction Calculator Square Root Calculator Exponent Calculator Logarithm Calculator Average Calculator GCD & LCM Calculator Scientific Notation Calculator Random Number Generator Roman Numeral Converter
Financial Calculators
Mortgage Calculator Loan Payment Calculator Compound Interest Calculator Simple Interest Calculator Tip Calculator Sales Tax Calculator Discount Calculator ROI Calculator Salary Calculator Net Pay Calculator
Health & Fitness
BMI Calculator Calorie Calculator Body Fat Calculator Ideal Body Weight Calculator Protein Intake Calculator Water Intake Calculator Pregnancy Due Date Calculator Heart Rate Zone Calculator Pace Calculator Macro Calculator
Conversion Tools
Length Converter Weight Converter Temperature Converter Volume Converter Speed Converter Area Converter Data Storage Converter Time Zone Converter Energy Converter Pressure Converter
Date & Time
Age Calculator Date Difference Calculator Days Until Calculator Day of the Week Calculator Work Days Calculator Time Duration Calculator Unix Timestamp Converter Leap Year Calculator
Text & Data Tools
Word Counter Case Converter Lorem Ipsum Generator Password Generator String Length Calculator CSV to JSON Converter Base64 Encoder/Decoder URL Encoder/Decoder Hash Generator Regex Tester
Science & Engineering
Ohm's Law Calculator Density Calculator Velocity Calculator Acceleration Calculator Force Calculator Kinetic Energy Calculator Wavelength-Frequency Calculator pH Calculator Molar Mass Calculator Fuel Consumption Calculator
Everyday & Misc
Tip Splitter GPA Calculator Grade Calculator Screen PPI Calculator Aspect Ratio Calculator Color Converter Shoe Size Converter Ring Size Converter Cooking Measurement Converter Concrete Calculator
Cryptography & Security
MD5 Hash Generator SHA-256 Hash Generator SHA-512 Hash Generator SHA-1 Hash Generator HMAC Generator AES Encrypt / Decrypt UUID Generator Bitcoin Address Generator
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