VAT / Sales Tax Calculator
Add VAT or sales tax to a price, or strip it out of a tax-inclusive total — at any rate you enter.
Take-Home Pay Calculator
Start from gross salary, add your own deduction rows, and see the real net pay per month and per year.
Depreciation Calculator
Straight-line and declining-balance schedules for any asset, year by year, ready for your books.
Break-Even Calculator
Find how many units you must sell to cover your costs — and what profit looks like beyond that point.
Margin & Markup Calculator
Convert between cost, price, margin, and markup — and find the price that hits your target margin.
Loan Payment Calculator
Monthly payment, total interest, and a first-year amortisation breakdown for any loan or finance deal.
Compound Interest Calculator
See savings and investments grow with regular monthly contributions, year by year.
Invoice Total Calculator
Build an invoice with line items, discount, and tax — and print a clean total for your client.
Salary to Hourly Converter
Convert an annual salary to hourly, weekly, and monthly pay — or turn an hourly rate into a salary.
Business Ratios Calculator
Current ratio, quick ratio, debt-to-equity, and gross margin — with plain-English explanations.
Why accountants and bookkeepers use AccountantKit
Rate-driven, so it never goes out of date
Tax law changes every year and differs in every country — so none of our tools bake in a tax rate. You type in the VAT rate, deduction percentages, or interest rate that applies to you, and the calculator does the arithmetic. A tool built this way is as correct in five years as it is today.
Formulas shown, not hidden
Every page shows the formula it uses, so you can check the working against your own textbooks, spreadsheets, or accounting software before you rely on a number.
Private by design
All calculations run in your browser. The figures you enter never leave your device, which makes these tools safe for client numbers and draft workings.
Frequently asked questions
Is AccountantKit really free?
Yes. Every calculator is completely free, with no account, subscription, or usage limit.
Which country's tax rules do the tools use?
None are built in. You enter your own VAT or sales-tax rate, deduction percentages, and interest rates, so the tools work anywhere in the world.
Can I use these for client work?
They are ideal for quick estimates, sense-checks, and draft workings. For filed accounts and tax returns, confirm final figures with a qualified accountant, as the footer on every page notes.
Is my data stored anywhere?
No. Calculations happen entirely in your browser; the numbers you type are never uploaded or saved.