Free Online Calculators
Quick calculators for percentages, loan payments, units and dimensions.
Percentage Calculator
Calculate percentages and percentage change instantly.
Loan / EMI Calculator
Estimate monthly loan payments, total payment and interest.
Unit Converter
Convert common length, digital data size and temperature units.
Aspect Ratio Calculator
Calculate matching width or height.
Discount Calculator
Calculate discount amount and final sale price from an original price and percentage.
Age Calculator
Calculate age in completed calendar years, months and days from a date of birth.
Tip Calculator
Calculate tip, total bill and per-person share using any currency amount.
Check the input units and calculation basis
Choose a calculator for percentages, discounts, loan installments, age, tips or unit conversion. Start with the source amount, date or unit pair, and review the output labels before using the number. A percentage change uses the original amount as its base.
Calculations are general estimates, not financial, legal or measurement advice. Loan installments assume the inputs and formula shown; lender fees and repayment terms can change the actual cost. Age depends on the reference date. Storage-unit conversions on this site use powers of 1024 for the displayed KB, MB and GB units.