Free Calculators for Everyone
CalcBird Community is a free, open collection of online calculators for finance, health, math, dates and conversions.
115 calculators across 10 categories
Financial
Loan, mortgage, interest, savings, tax, retirement and everyday money calculators.
42 calculators →
Health & Fitness
BMI, calorie, body fat, pregnancy, nutrition and fitness calculators.
21 calculators →
Math
Percentages, averages, ratios and general-purpose math calculators.
3 calculators →
Date & Time
Age, date difference, time zone and duration calculators.
2 calculators →
Unit Conversion
Convert length, weight, temperature, speed, currency and digital storage units.
10 calculators →
Real Estate
Home affordability, mortgage, rent vs buy, property tax and rental yield tools.
11 calculators →
Business
Break-even, profit, margin, markup and commission calculators for small business.
5 calculators →
Utilities
Scientific calculator, bandwidth, download time, currency and everyday tools.
16 calculators →
Education
GPA, exam percentage and academic conversion calculators.
3 calculators →
Auto & Travel
Car loan, lease, fuel cost, MPG and travel budgeting calculators.
2 calculators →