Free calculators built for Nigeria

Up-to-date tools for tax, power, school and money — no sign-up, works on any phone.

All tools

TaxPAYE & Salary Calculator 2026Take-home pay under the Nigeria Tax Act 2025 — new bands, rent relief, pension.PowerElectricity Units (kWh) CalculatorHow many units your prepaid token buys, by tariff band, plus appliance running costs.PowerSolar & Inverter Size CalculatorWhat inverter (kVA), battery and number of panels your home or office needs.TaxVAT Calculator (7.5%)Add or remove Nigerian VAT from any amount in one click.EducationJAMB / Post-UTME Aggregate CalculatorYour admission aggregate from UTME, Post-UTME and O'Level grades.MoneyLoan Repayment CalculatorMonthly repayment, total interest and a full schedule for any loan.MoneyNaira Amount in WordsConvert any figure to words for cheques, invoices and receipts.

Why NairaCalc?

Most online calculators are built for the US or UK. NairaCalc uses Nigerian rules and prices — the 2026 tax bands from the Nigeria Tax Act 2025, NERC tariff bands, 7.5% VAT, and JAMB screening formulas — and is updated when they change.