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Free Online Tools, Calculators & Converters

Secure, client-side utilities for developers, finance, and health.

Client-side execution Deterministic algorithms ISO / SI referenced formulas

Core Utilities

Mortgage Calculator
BMI Calculator
Scientific Calc
Password Gen
Image Compressor
Merge PDF

Financial Calculators & Planning Tools

Bank-standard formulas for mortgage, loan, and investment planning.

Mortgage Calculator
Loan Amortization
Compound Interest
Salary Calculator
Investment Growth
Retirement Planner
Auto Loan
Income Tax
Simple Interest
Inflation Calculator
Sales Tax

Health & Biometric Calculators

WHO/CDC-aligned tools for body composition and tracking.

BMI Calculator
Body Fat %
Calorie Calculator
BMR Calculator
Ideal Weight
Pregnancy Due Date
Conception Date
Pace Calculator

Education & Math Utilities

Scientific and engineering tools for students and professionals.

Scientific Calc
Fraction Solver
Percentage Change
Standard Deviation
Triangle Solver
Volume Calculator
Quadratic Solver
Random Number
Velocity Calc
Kinetic Energy
Force Calculator
Ohm's Law
Density Calc
Power Calculator
Age Calculator
Date Calculator
GPA Calculator
Grade Calculator
Time Calculator
Hours Calculator
Concrete Calculator

Creative Studios

Private, browser-based media processing tools.

Image Tools

Compress Convert

PDF Tools

Merge Split

Video Tools

Convert Edit

Dev Tools

JSON SQL

Unit Converters

LengthWeightTemperatureDigital StorageData TransferTime ZoneSpeedAreaVolumeView All →
Trusted Architecture

The Science of Precision

Our tools use verified deterministic algorithms and client-side execution to ensure absolute precision and privacy. No estimations, no data leaks.

Are these tools free? Are the results accurate? Is my data private?
Learn how our calculations work →
Last updated: January 2026
Formulas verified against global standards