swdrana Free Online Tools

Calculator Tools

Quick, private calculators for dates, money, health, and everyday units.

Find exact age in years, months and days from a date of birth.

Measure the exact calendar and total time between two dates.

Calculate percentages, ratios and percentage change instantly.

Estimate monthly loan payments, total interest and amortization.

Convert length, weight, temperature and data sizes in either direction.

Calculate body mass index with metric or imperial measurements.