Calculator Tools
Fast browser-based calculators for everyday numbers, money, dates and health metrics.
Percentage Calculator
Three common percentage calculations in one tool.
Percentage Change
Compare old and new values with direction and absolute difference.
Unit Price Calculator
Compare two products or pack sizes by unit cost.
Mortgage Calculator
Estimate principal, monthly payment and total interest with down payment.
Loan Payment Calculator
Estimate monthly payments, total interest and payoff amount.
Compound Interest
Estimate growth with recurring monthly contributions.
Discount Calculator
Calculate savings, sale price and optional tax.
VAT Calculator
Add or remove VAT with net, tax and gross amounts.
Tip Calculator
Use quick tip presets and split the total per person.
BMI Calculator
Calculate BMI in metric or imperial units with category guidance.
Age Calculator
Calculate years, months, days and total elapsed days.
Date Difference
Calculate days, weeks and calendar duration between dates.
Time Duration
Calculate elapsed hours, minutes and decimal hours across midnight.
Aspect Ratio Calculator
Resize dimensions proportionally with ratio presets.
Scientific Calculator
Evaluate powers, roots, trig and logarithms.
Fraction Calculator
Add, subtract, multiply and divide fractions exactly.
Average Calculator
Calculate mean, median, sum, min and max.
ROI Calculator
Measure profit, ROI percentage and return multiple.
Profit Margin Calculator
Calculate profit, margin and markup.
Markup Calculator
Calculate selling price from cost and markup.
Sales Tax Calculator
Add or remove sales tax from a price.
Simple Interest Calculator
Calculate non-compounding interest.
GPA Calculator
Calculate a credit-weighted GPA.
Grade Calculator
Calculate weighted course grades.
Days Until Date
Count days to a future or past date.
Date Add / Subtract
Move dates by days, weeks, months or years.
Everyday calculators in one place
Calculate percentages, loans, mortgage payments, interest, taxes, dates, grades, BMI and common business metrics with instant browser-based results.
Estimate and verify
Financial and health calculators are general-purpose estimates and may not include every fee, tax rule, lender convention or personal factor. Use the displayed assumptions and verify important decisions with the relevant official or professional source.