Finelib Calculators

Free calculators for everyday and business decisions

Estimate building materials, solar and generator sizes, loans and taxes, farm output, school grades, health targets and event budgets, in seconds.

149calculators
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Browse by family

Agriculture & Farming

Agriculture & Farming

Estimate crop yields, farming costs, produce pricing, livestock and fish farming requirements.

15 calculators
Automotive & Transport

Automotive & Transport

Use free automotive and transport calculators for vehicle costs, fuel, fleet operations.

20 calculators
Construction & Building

Construction & Building

Estimate construction materials, quantities, labour and project budgets: cement, blocks.

22 calculators
Education & Career

Education & Career

Free education and career calculators for grades, GPA, CGPA, JAMB, WAEC, study planning.

15 calculators
Energy & Power

Energy & Power

Estimate solar, inverter, battery, generator and electricity requirements and costs.

12 calculators
Finance & Business

Finance & Business

Calculate business profit, loans, cash flow, VAT, PAYE, payroll and investment returns.

20 calculators
Food & Events

Food & Events

Plan catering, meal portions, restaurant costs, wedding budgets and events with free Food &.

15 calculators
Health & Fitness

Health & Fitness

Free health and fitness calculators: BMI, calorie needs, BMR, body fat, heart rate zones.

15 calculators
Property & Real Estate

Property & Real Estate

Estimate property ownership, rent, rental yields, affordability, land size and investment.

15 calculators

Popular calculators

Cement Calculator

Use the Finelib Cement Calculator for Nigeria planning estimates, assumptions and supplier comparisons.

Block Calculator

Estimate sandcrete blocks needed for walls in Nigeria, deduct openings, add wastage and continue to Finelib.

Solar System Size Calculator

Use the Finelib Solar System Size Calculator for Nigeria planning estimates, assumptions and supplier.

Generator Fuel Cost Calculator

Estimate generator fuel consumption and operating cost in Nigeria using your generator's fuel-use rate.

PAYE Salary Tax Calculator

Estimate Nigerian PAYE salary tax using a clearly labelled 2026 Nigeria Tax Act ruleset, progressive tax.

VAT Calculator

Calculate VAT from VAT-exclusive or VAT-inclusive amounts. Enter the applicable VAT rate to calculate net.

Loan Repayment Calculator

Calculate monthly loan repayment, total interest and total repayment in Nigeria using reducing-balance.

JAMB Aggregate Score Calculator

Calculate an illustrative JAMB UTME and Post-UTME admission aggregate using 50/50, 60/40, 70/30 or your.

BMI Calculator

Free Finelib BMI calculator for Nigeria. Enter adult weight in kg and height in feet and inches, then.

Building Cost Calculator

Plan a Nigerian building budget using floor area, project scope, finish level, location, external works.

Rental Yield Calculator

Calculate gross and net rental yield from property investment value, rent, occupancy and operating expenses.

Wedding Budget Calculator

Plan wedding expenses in Nigeria: venue, catering, attire, decoration, entertainment, photography, transport.

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Frequently asked questions

What types of calculators are available?

Nine families covering agriculture, automotive, construction, education, energy, finance, food and events, health and fitness, and property.

How do I find a specific calculator?

Type its name in the search box at the top of this page, or open a family page and choose from its full list.

Are the calculators free?

Yes. Every calculator is free to use and works in your browser on phone or computer.

Can I rely on results for professional decisions?

Calculator outputs are estimates and are not a substitute for professional verification where required.