Calculators
Specialized calculators for developers and finance. Built for performance and privacy. Instant processing directly in your browser.
Percentage Calculator
Calculate percentage of a number, percentage change, what percent X is of Y, and work backward from a percentage — all in one tool.
Loan Calculator
Calculate monthly EMI, total interest paid, and view a full month-by-month amortization schedule for any loan.
Investment Calculator
Calculate compound interest returns for lump-sum or monthly SIP investments with a year-by-year growth chart, wealth breakdown, and Rule of 72 insight.
Age Calculator
Find your exact age in years, months, days, weeks, and total hours from any date, with a next birthday countdown.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and back. Supports seconds and milliseconds with a live Unix timestamp clock.
Number Base Converter
Convert any number between binary, octal, decimal, and hexadecimal bases instantly with input validation and one-click copy.
BMI Calculator
Calculate your Body Mass Index in metric or imperial units with a visual gauge, BMI category, and healthy weight range.
Aspect Ratio Calculator
Calculate width, height, or ratio from any two values. Supports common presets like 16:9, 4:3, and 1:1 with a visual preview.
Color Contrast Calculator
Check foreground and background color contrast ratios against WCAG AA and AAA accessibility standards with a live preview.
Tip Calculator
Calculate tip, total bill, and split between people.
Discount Calculator
Find discounted price and savings from a % off.
GST / VAT Calculator
Add or remove GST/VAT from any amount.
Currency Converter
Convert between major world currencies.
Scientific Calculator
Full scientific calculator with history.
Margin Calculator
Calculate gross margin, markup, and profit.
ROI Calculator
Calculate Return on Investment percentage.
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