Free Online Calculators

Your essential hub for finance, health and everyday math.

UnitSage — Tools
calculators & converters
Financial
💰
Interest
Simple & compound growth
→ 🚗
Auto Loan
Car payments & financing
→ 📊
Budget Planner
Track income & expenses
→ 🎓
Child Education
Project future tuition costs
→ 💳
Debt Payoff
Snowball vs. Avalanche
→ 🏦
EMI Calculator
Monthly loan installments
→ 🏠
Home Affordability
How much house can you buy?
→ 📈
Investment
Forecast portfolio growth
→ 🧓
Retirement
Plan long-term savings
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Health & Fitness
⚖️
BMI Calculator
Body Mass Index check
→ 🔥
BMR Calculator
Calories burned at rest
→ ⚡
TDEE Calculator
Total daily energy use
→ 🍎
Macronutrients
Optimal protein/carbs/fat
→ 🧍
Body Fat
Estimate fat percentage
→ 👶
Pregnancy Due Date
Estimate baby arrival
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Math & Engineering
🧮
Scientific Calc
Complex math functions
→ %
Percentage
Solve % problems easily
→ 🌡️
Thermal Properties
Conductivity & expansion
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Unit Converters
📏
Length
mm, cm, m, km, in, ft, yd
→ 🌡️
Temperature
Celsius, Fahrenheit, Kelvin
→ ⚖️
Weight / Mass
g, kg, oz, lb, tons
→ 🥛
Volume
ml, L, cups, gal, fl oz
→ 💨
Speed
m/s, km/h, mph, knots
→ 💾
Data Storage
KB, MB, GB, TB, PB
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