Kalkmi Online calculators
English

Free Online Calculators

Calculator descriptions

VAT Calculator — Add, Remove & Find VAT

Add VAT to a net price, remove VAT from a gross total, or find the effective VAT rate with currencies, rounding, formulas, and a clear tax breakdown.

Discount Calculator — Percent Off, Coupons & Tax

Edit price, quantity, stacked discounts, coupons, tax and shipping beside a live checkout total, savings, effective discount, and per-item price.

Margin Calculator

Analyze gross margin, markup, net profit, fees, discounts, tax, overhead, break-even quantity, target prices, and pricing scenarios.

Currency Converter - Rates, Fees & History

Convert 27 currencies with dated institutional rates, calculate the amount received after markup and fees, compare providers, and inspect historical trends.

Percentage Calculator - Change, Points & More

Choose a percentage question and edit its values beside a live answer, supporting change, difference, percentage points, reverse, and compound modes.

Mortgage Calculator — Payment, Affordability & Extra Savings

Edit home price, down payment, rate, taxes, insurance and fees beside a live monthly payment, affordability, cash-to-close and extra-payment plan.

Car Loan Calculator — Payment, Budget, Payoff & Offers

Calculate a car payment from the complete deal, reverse a monthly budget, test extra-payment payoff, compare two offers, or estimate a lease.

Loan Calculator - Payments, Payoff & Amortization

Calculate a fixed loan payment, model extra-payment payoff, estimate an affordable loan amount, compare offers, and inspect annual or monthly amortization.

Inflation Calculator — See How Inflation Affects Your Money

Compare official U.S. CPI-U annual averages through 2025, purchasing power, personal basket inflation, salary changes, and user-defined future scenarios.

Compound Interest Calculator — Savings Growth & Goals

Project compound interest with monthly contributions, compare APR and APY, adjust for inflation, or calculate the monthly savings needed for a goal.

Debt Payoff Calculator

Compare debt avalanche and snowball with the same budget. See what to pay each creditor each month, add one-time extras and download your plan.

PPF Calculator — Deposits, Interest & Maturity

Plan Indian PPF deposits by financial year. See how the fifth-day rule, irregular credits and quarterly rates affect interest and maturity.

Text copied
Removal error
Restore error
Calculator published
Calculator unpublished
Feedback sent
Done
Error
Author received:++
Calculator removed

Install as an app

Open the browser menu and choose “Add to Home Screen” or “Install app”.