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Free browser-based tools for image conversion, age calculations, solar planning in Pakistan, salary tax, Zakat, freelancer tax and university admission aggregates. Pick a tool, enter the details and get a useful result without creating an account.
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Try solar, tax, Zakat, NUST, FAST, age, image or calculator.
Popular tools for common tasks.
Start with the calculators and utilities most likely to solve an immediate task, then browse the full collection by category.
Solar System Size Calculator
Add appliances to estimate solar system kW, panel count, inverter load and battery capacity before requesting quotations.
Estimate solar size ↗Pakistan Salary Tax Calculator
Calculate monthly and annual salary tax for 2026-27, 2025-26 and previous FBR tax years.
Calculate salary tax ↗ Everyday utilityFree Image Converter
Convert JPG, PNG, WebP, AVIF, GIF and BMP directly in the browser.
Convert image ↗Browse by what you need to calculate.
Each tool has one focused job, clear inputs and supporting notes where formulas, tax rules or admission criteria can change.
Image & Utility Tools
Fast browser tools for common daily tasks.
Solar Calculators Pakistan
Estimate system size, backup requirements, savings and payback before comparing solar quotations.
Solar System Size Calculator
Add appliances to estimate solar kW, panel count, inverter load and battery capacity.
Estimate solar size ↗Solar ROI Calculator Pakistan
Estimate annual generation, bill savings, export credit, payback time and long-term return.
Calculate solar ROI ↗Finance, Tax & Zakat Tools
Estimate salary tax, freelancer export withholding and Zakat in PKR with clear assumptions, source notes and current-year references where rules can change.
FBR IT Export Tax Calculator
Estimate Section 154A withholding tax for PSEB-registered IT/ITeS exporters and other export-of-services cases.
Calculate export tax ↗Pakistan Salary Tax Calculator
Estimate monthly and annual salary income tax for 2026-27, 2025-26 and earlier FBR tax years.
Calculate salary tax ↗Zakat Calculator Pakistan 2026
Calculate Zakat on gold, cash, savings and other eligible wealth, and compare your net amount with the selected Nisab.
University Admission Calculators
Estimate admission aggregates using the published weightages for major Pakistani universities.
NUST Aggregate Calculator
Calculate NET-based NUST aggregate from NET, HSSC/A-Level and SSC/O-Level scores.
Calculate NUST aggregate ↗FAST Aggregate Calculator
Estimate merit aggregate for FAST computing, business and engineering undergraduate programs.
Calculate FAST aggregate ↗Not sure which calculator you need?
Choose the task and jump directly to the most relevant free online tool instead of browsing every category.
Useful calculations with the assumptions kept visible.
This tools hub brings together free online calculators for Pakistani students, freelancers, solar buyers and everyday web users. Each tool focuses on one clear task instead of trying to do everything at once.
For information that can change, such as FBR withholding rates, energy rules or university merit criteria, the relevant tool page can include an update date and supporting source notes. Final tax, tariff and admission decisions should still be confirmed with the relevant authority.
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