Financial Calculators
SIP Calculator
Model recurring investment contributions using the contribution, duration, and assumed return you enter.
Lumpsum Calculator
Model one-time investment growth using the initial amount, duration, and assumed return you enter.
Mortgage Calculator
Estimate a loan payment from principal, interest rate, term, and optional costs entered on the page.
GST Calculator
Add or remove a stated GST rate from a price and show the resulting tax amount.
Income Tax Calculator
Estimate US federal income tax from the filing inputs and rules implemented on the page.
Income Tax Calculator India
Estimate Indian income tax from the selected regime, financial year, and income inputs.
Salary Calculator India
Estimate in-hand salary from the CTC, pay components, and deductions entered.
Math Calculators
Health Calculators
Date, Time, and Other Calculators
Age Calculator
Calculate elapsed age between a birth date and a selected comparison date.
Random Card Generator
Generate a random set of cards from the deck options exposed by the page.
Date Calculator
Add or subtract a stated number of days, weeks, months, or years from a date.
Date Difference Calculator
Calculate the elapsed difference between two dates using the page's selected units.
Birthday Calculator
Calculate age and the time until a next birthday from the dates entered.
Time Calculator
Add or subtract time values and calculate a duration from the entries provided.
Hours Calculator
Calculate elapsed hours from the start, end, and break values entered.
Time Card Calculator
Total work hours and optional pay from time-card entries and rules entered.
How to choose and check a result
Pick the page whose inputs match the problem. Enter values using the units and definitions shown on that page, then check the displayed formula and assumptions. A result is only as useful as the inputs and model behind it.
Finance, tax, and health tools provide estimates or educational calculations. They do not replace current official guidance or professional advice. Confirm time-sensitive rules, rates, and personal decisions with an appropriate source.
The directory is generated from the calculator registry so a link is added only when its page exists in the application. The linked page is the source of truth for supported inputs, formulas, units, and result limits; a directory description is only a short orientation.
Directory reviewed August 23, 2026. Individual calculator pages may be updated on a different schedule.
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