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Free Online Calculators
That Actually Work

Fast, accurate, and privacy-first tools for finance, health, salary, investing, freelancing, and more. Your data never leaves your device.

38Live Tools

6Categories

0Sign-ups

100%Private

Most Popular

Compound Interest

Percentage Calc

Password Generator

YouTube Earnings

Salary Calculator

All 38 Calculators

38 tools

Compound Interest Calculator

Visualise compound interest growth with full year-by-year breakdown

Crypto Profit Calculator

Calculate exact crypto trade profit or loss including exchange fees and ROI

Inflation Calculator

Discover how inflation erodes your purchasing power with year-by-year table

Investment Return Calculator

Project portfolio future value with starting principal and monthly contributions

Loan Payment Calculator

Calculate monthly loan payments, total interest, and extra payment savings

Rent vs Buy Calculator

Compare the real long-term cost of renting vs buying including equity

Salary Calculator

Convert gross to net take-home pay — monthly, bi-weekly, and hourly breakdown

Savings Goal Calculator

Find exactly how much to save per month to reach any financial goal on time

Estimate your US federal income tax with full bracket-by-bracket breakdown

Freelance Rate Calculator

Calculate minimum viable hourly rate from income goal, overhead & profit margin

Hourly ↔ Salary Converter

Instantly convert between hourly wage and annual salary with full breakdown table

Invoice Fee Calculator

See exactly what PayPal, Stripe, Wise & Venmo charge on any invoice

Project Pricing Calculator

Build accurate project quotes with scope creep buffer and visual cost breakdown

Break-Even Calculator

Find the exact sales volume needed to cover all costs and start turning a profit

Time Tracking Calculator

Log multiple work sessions, calculate total hours, and estimate your earnings

Productivity Score Calculator

Score your daily productivity based on tasks completed, focus time, and breaks

Calculate tip and split the bill between any number of people instantly

Calculate your Body Mass Index in metric or imperial with health category

Find exact age in years, months, days, total hours, and days to next birthday

Calorie Calculator

Calculate daily calorie needs (TDEE & BMR) for weight loss, maintenance, or gain

Water Intake Calculator

Find personalised daily water intake based on weight, activity & climate

Fuel Cost Calculator

Calculate exact fuel costs for any trip or commute with annual spend comparison

Trip Budget Calculator

Plan your complete travel budget — flights, hotel, food, transport, and activities

Electricity Cost Calculator

Find out exactly how much any appliance costs to run — daily, monthly, annual

Discount Calculator

Calculate final sale price and total savings from any discount percentage instantly

YouTube Earnings Calculator

Estimate YouTube AdSense revenue from views, CPM, and niche with projections

Calculate CPM, total ad spend, or impressions for any advertising campaign

Instagram Engagement Calculator

Calculate your Instagram engagement rate and benchmark it against industry averages

TikTok Earnings Calculator

Estimate TikTok Creator Fund and brand deal earnings based on your views

Hashtag Generator

Generate trending hashtags for your niche to maximise reach and discoverability

Percentage Calculator

Three modes: find X% of Y, percentage change, and what % one number is of another

Password Generator

Generate strong cryptographically random passwords with real-time strength check

Convert between any units — length, weight, temperature, volume, area, speed, data

Random Number Generator

True random numbers, dice roller, coin flip, and lottery number picker

Time Zone Converter

Convert times between any world time zones with live world clock display

File Size Converter

Convert between bytes, KB, MB, GB, TB — binary and decimal standards

JSON Formatter & Validator

Format, validate, beautify, and minify JSON with syntax error detection

Base64 Encoder / Decoder

Encode plain text to Base64 or decode Base64 strings back to readable text