Free Online Calculators & Tools
36+ free tools for finance, math, conversions, AI productivity, text editing, and health. No signup, no installs, no tracking — just results.
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Finance Tools
Mortgage, loan, retirement, savings, credit card payoff, ROI
9 toolsMath Tools
Percentage, scientific, fraction, age, date, random number
6 toolsConverters
Unit, currency, temperature, color, base64, time zone, base
7 toolsAI Tools
AI calculator, productivity, prompts, hashtag, email subject, rewriter
6 toolsText Tools
Word counter, character counter, case converter, text reverser
4 toolsHealth Tools
BMI, calorie/TDEE, body fat, water intake
4 toolsPopular right now
Mortgage Calculator
Monthly payment with property tax, insurance, PMI, HOA. Full amortization.
Open →Compound Interest
Future value with monthly contributions. Year-by-year breakdown.
Open →Percentage Calculator
6 modes — what percent, % of, % change, % increase/decrease.
Open →Scientific Calculator
sin/cos/tan/log/ln/exp/fact. RAD/DEG modes. Keyboard input.
Open →Currency Converter
Live ECB exchange rates. 30+ world currencies.
Open →BMI Calculator
Body Mass Index with WHO categories and color-coded scale.
Open →Why CalcLabHub?
100% free
Every tool is free, no signup required.
Privacy first
Runs locally in your browser. Nothing uploaded.
Mobile friendly
Works great on phones, tablets, desktops.
Fast & accurate
Validated formulas, instant results.