Free Online Calculators
Every calculator here runs entirely in your browser — instant results, no sign-up, and nothing you enter is ever uploaded. Pick a tool to get started.
- Compound Interest Calculator
Calculate compound interest and investment growth with monthly contributions. Free, accurate, and it runs entirely in your browser.
- Salary to Hourly Calculator
Convert an annual salary to an hourly wage and back, with weekly and monthly breakdowns. Free and private — it all runs in your browser.
- Percentage Calculator
Free percentage calculator: find X% of a number, what percent X is of Y, percentage change and discounts — instant results in your browser.
- Age Calculator
Free age calculator: get your exact age in years, months and days, or the number of days between any two dates. Runs entirely in your browser.
- Loan Calculator (EMI)
Free loan calculator with monthly payment (EMI), total interest and a full amortization schedule. Accurate bank formula, in your browser.
- Mortgage Calculator
Free mortgage calculator: monthly payment from home price, down payment, rate and term, plus total interest. Runs entirely in your browser.
- Freelance Rate Calculator
Work out the hourly rate you must charge as a freelancer — factoring unpaid time off, self-employment tax and real billable hours, not just salary ÷ 2080.
- Markup, Margin & VAT Calculator
Free markup, margin and reverse-VAT calculator: turn cost into selling price, convert markup to margin, and add or remove VAT — instantly, in your browser.