Free personal & digital finance tools
Every Kritvox finance calculator in one place — 25 planners, loan and tax tools that run entirely in your browser. Nothing is uploaded, nothing is stored, and there is no signup.
Loans & EMI
Work out monthly payments, total interest and how much you can actually borrow.
Loan Calculator
Work out the monthly payment, total interest and total cost of any loan. Free online loan calculator that runs in your browser — no upload, no watermark, no…
EMI Calculator
Calculate the equated monthly instalment (EMI) for a loan. Free online emi calculator that runs in your browser — no upload, no watermark, no sign-up.
Mortgage Calculator
Estimate a monthly mortgage payment including tax and insurance. Free online mortgage calculator that runs in your browser — no upload, no watermark, no sign…
Car Loan Calculator
See the monthly repayment and interest cost on a car loan. Free online car loan calculator that runs in your browser — no upload, no watermark, no sign-up.
Home Loan Eligibility Calculator
Estimate how much you could borrow based on income and existing debts. Free online home loan eligibility calculator that runs in your browser — no upload, no…
Credit Card Payoff Calculator
See how long it takes to clear a card balance and what it costs. Free online credit card payoff calculator that runs in your browser — no upload, no watermar…
Investing & growth
Present value, compounding and long-horizon planning in one place.
Compound Interest Calculator
See how savings grow with compound interest over time. Free online compound interest calculator that runs in your browser — no upload, no watermark, no sign-…
Simple Interest Calculator
Calculate simple interest and the final amount on a principal. Free online simple interest calculator that runs in your browser — no upload, no watermark, no…
SIP Calculator
Project the maturity value of a monthly systematic investment plan. Free online sip calculator that runs in your browser — no upload, no watermark, no sign-u…
Lump Sum Investment Calculator
Find the future value of a one-off investment. Free online lump sum investment calculator that runs in your browser — no upload, no watermark, no sign-up.
ROI Calculator
Measure return on investment as a percentage and annualised rate. Free online roi calculator that runs in your browser — no upload, no watermark, no sign-up.
Inflation Calculator
See what an amount of money will be worth after years of inflation. Free online inflation calculator that runs in your browser — no upload, no watermark, no…
Personal planning
Savings targets, retirement numbers and take-home pay.
Retirement Calculator
Estimate your retirement pot from current savings and monthly contributions. Free online retirement calculator that runs in your browser — no upload, no wate…
Savings Goal Calculator
Work out how much to save each month to hit a target amount. Free online savings goal calculator that runs in your browser — no upload, no watermark, no sign…
Salary Calculator
Convert a salary between hourly, daily, weekly, monthly and yearly pay. Free online salary calculator that runs in your browser — no upload, no watermark, no…
Hourly to Annual Salary Calculator
Turn an hourly wage into weekly, monthly and annual income. Free online hourly to annual salary calculator that runs in your browser — no upload, no watermar…
Freelance Hourly Rate Calculator
Work out the hourly rate you need to charge to hit an income target. Free online freelance hourly rate calculator that runs in your browser — no upload, no w…
Tax & pricing
Sales tax, GST/VAT and margin maths for invoices and quotes.
Income Tax Calculator
Estimate income tax using simple progressive brackets you control. Free online income tax calculator that runs in your browser — no upload, no watermark, no…
GST Calculator
Add or remove GST from any amount at any rate. Free online gst calculator that runs in your browser — no upload, no watermark, no sign-up.
VAT Calculator
Add or strip VAT from a price at any VAT rate. Free online vat calculator that runs in your browser — no upload, no watermark, no sign-up.
Sales Tax Calculator
Calculate sales tax and the final checkout total. Free online sales tax calculator that runs in your browser — no upload, no watermark, no sign-up.
Profit Margin Calculator
Calculate gross profit, margin and markup from cost and revenue. Free online profit margin calculator that runs in your browser — no upload, no watermark, no…
Break-Even Calculator
Find how many units you must sell to cover your fixed costs. Free online break-even calculator that runs in your browser — no upload, no watermark, no sign-u…
Discount Calculator
Find the sale price and how much you save on a discounted item. Free online discount calculator that runs in your browser — no upload, no watermark, no sign-…
Tip Calculator
Split a bill and work out the tip per person. Free online tip calculator that runs in your browser — no upload, no watermark, no sign-up.
Finance guides
Comparisons and explainers to help you pick the right tool before you start crunching numbers.
Why use browser-based finance tools?
Money data is sensitive. Salary figures, loan balances and tax numbers do not need to leave your device to be useful, so every calculator here computes locally in JavaScript — there is no account, no upload endpoint and no analytics profile attached to what you type.
That also makes them fast: results update as you change an input, so you can compare a 15-year and a 20-year loan, or two tax scenarios, in seconds. For document work like exporting or merging statements, see the PDF tools category.