Sri Lanka Calculators & Converters

Free calculators for the money and land questions people in Sri Lanka ask most. Work out the monthly instalment (EMI) on a loan before you go to the bank. Convert perches to square feet from a deed or survey plan. Check the EPF and ETF on a payslip, or add or remove 18% VAT on an invoice. Learning to drive? There's a free mock exam for the written test. Each tool shows how it works and the date we last checked it. The loan calculator is a planning tool, not a bank quotation, so confirm the final figures with your lender.

Which calculator do I need?

Pick the task that matches yours. Each one links to the tool, and every figure here is also on that tool's page.

Comparing a bank loan offer. Enter the amount, the rate and the term in the loan EMI calculator. It uses the reducing-balance method and shows the monthly instalment, total interest and a month-by-month schedule. We don't quote bank rates, so use the rate your bank gives you.
Reading a deed or survey plan. Land in Sri Lanka is measured in perches, roods and acres (A-R-P). The perch to square feet converter uses 1 perch = 272.25 sq ft and 160 perches = 1 acre.
Checking your payslip. You pay 8% EPF from your salary. Your employer pays 12% EPF and 3% ETF on top. The EPF and ETF calculator shows all three for any monthly salary.
Adding or removing VAT on an invoice. The standard rate is 18%. To take VAT out of a VAT-inclusive price, multiply by 18/118. The VAT calculator does both. Registering a new business first? See the business and company registration guide.
Preparing for the DMT written test. Take the free driving license mock exam. Practise by topic, or try a timed 40-question run. The 40-question format is an estimate, because the DMT doesn't publish it. To read every question at once, open the driving license exam paper with answers.
Renewing your license, not sitting the test. You don't need a calculator for that. Go to the driving license renewal guide.

Loans & land

Loan EMI Calculator

Work out the monthly instalment (EMI), total interest and full repayment schedule for a personal, vehicle or housing loan, using the reducing-balance method.

Last checked 28 Sep 2026

Perch to Square Feet Converter

1 perch = 272.25 sq ft. Convert perches to square feet, square metres, roods, acres and hectares, and read the A-R-P extent on a deed or survey plan.

Last checked 9 Sep 2026

Salary & tax

EPF & ETF Calculator

See your 8% EPF deduction and your employer's 12% EPF and 3% ETF for any monthly salary. ETF is paid by the employer, never taken from your pay.

Last checked 27 Sep 2026

VAT Calculator & Guide

Add or remove Sri Lanka's 18% VAT on any price. Also shows when a business must register for VAT: Rs 15M in a quarter or Rs 60M in 12 months.

Last checked 27 Sep 2026

Driving license test

Driving License Mock Exam

Free driving license mock exam: 100 original practice questions on road signs, markings, speed limits and rules, with every answer explained.

Last checked 24 Sep 2026

Also here: the driving license exam paper with answers. All 100 questions on one page, each with its answer and its source.

How we check these tools

Each calculator shows its formula and the date we last checked it. Rates such as EPF, ETF and VAT come from the official source, and each one is listed with its date on our verified sources. You can also read how we verify information.

Missing a calculator you need? Request a new calculator.