Calculators
Everything you need for calculations
Fast, private, and calculated in your browser.
Age Calculator
Find calendar age in years, months, and days, plus elapsed weeks, days, and the next birthday.
Percentage Calculator
Solve percent-of, reverse-percentage, and percentage-change questions in three independent modes.
Tip Calculator
Calculate a tip, bill total, and equal per-person share using any tip percentage.
Discount Calculator
Find the amount saved, sale price, optional tax, and final checkout estimate.
Date Difference Calculator
Measure the difference between two dates in elapsed days, whole weeks, weekdays, or days remaining until a target.
EMI Calculator
Estimate a fixed monthly installment, total interest, total repayment, and yearly loan balances.
Loan Calculator
Analyze a fixed-rate loan payment, total borrowing cost, and first payment principal/interest split.
Mortgage Calculator
Estimate mortgage principal and interest plus optional property tax, insurance, and PMI.
Paycheck Calculator
Estimate 2026 US take-home pay from salary or hourly earnings, deductions, federal tax, FICA, and state tax.
BMI Calculator
Estimate adult body mass index with metric or imperial measurements and view the general CDC category.
GPA Calculator
Calculate a credit-weighted GPA by adding courses, credit hours, and letter grades on a 4.0 scale.
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Frequently Asked Questions
Do the calculators send my entered values to the server?
No. The calculator arithmetic runs in browser JavaScript and the forms do not submit calculator inputs to Tiny Tiny Tools.
Why can a displayed answer differ by a cent?
Intermediate calculations retain precision, while currency is displayed to two decimal places. A lender or payroll system may round at different stages.
Are financial calculator results quotes?
No. They are estimates from the stated formula and inputs, not an offer, approval, payoff statement, or guaranteed cost.
Which date calculator should I use?
Use Date Difference for a completed years/months/days duration. Use Days Between Dates for exact elapsed days, weekdays, or a countdown to a target date.
Can I use these calculators on a phone?
Yes. Inputs, result cards, and reference tables are designed to reflow or scroll safely on smaller screens.