165+ free tools · no sign-up · works on any phone
Every converter and calculator you need, in one place
Unit and currency converters, calculators, PDF and image tools, prayer times and Pakistan tools. Free, fast and private.
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Calculators
All 14 tools →Converters
All 24 tools →PDF & Image Tools
All 10 tools →Student Tools
All 11 tools →Work & Business
All 17 tools →International
All 22 tools →Pakistan Tools
All 35 tools →Date & Time
All 49 tools →Islamic Tools
All 14 tools →Cricket
All 9 tools →Packaging & Shipping
All 35 tools →Most popular free tools
These are the tools people open most often. Each one works instantly, explains its formula and has answers to common questions on the same page.
- Percentage calculator: percent of a number, percentage change and marks to percentage
- Age calculator: exact age in years, months and days
- Currency converter and USD to PKR: live exchange rates
- EMI calculator: monthly instalments for car, home and personal loans
- Salary tax calculator: Pakistan income tax 2026-27
- JPG to PDF and image compressor: documents ready for upload
- CBM calculator: shipment volume for freight
- Days until Ramadan: live countdown with dates by year
Browse tools by category
Calculators
Everyday maths, from the BMI Calculator and Discount Calculator to the Compound Interest Calculator. See all calculators.
Converters
Weight, length, temperature, area and Pakistani units such as marla and tola. See all converters.
PDF & Image Tools
Private, in-browser tools such as PDF to Word, PDF Merger and Image Resizer. See all PDF and image tools.
Student Tools
GPA, attendance, word count and citations. See all student tools.
Work & Business
Invoices, payslips, VAT and profit. See all business tools.
International
Remittance rates, time zones, VAT by country and dialing codes. See all international tools.
Pakistan Tools
Zakat, bijli bill, gold and holidays. See all Pakistan tools.
Date & Time
Countdowns, date maths, timers and calendars. See all date and time tools.
Islamic Tools
Prayer times, Qibla, Hijri date and tasbeeh. See all Islamic tools.
Cricket
Run rate, NRR and strike rate. See all cricket calculators.
Packaging & Shipping
Volumetric weight, container loading and barcodes. See all shipping tools.
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Everyday answers, without the hassle
Custom Converter is a free collection of 165 online tools for the small questions that come up every day. How much will my car loan installment be? What's 18% of this price? How many marla is my plot? What is the dollar rate today? Instead of opening a spreadsheet or doing the maths by hand, you type in your numbers and get the answer straight away.
The tools are grouped so you can find what you need quickly. There are calculators for loans, EMI, BMI, age, percentages and compound interest. There are converters for currency, weight, length, temperature and land units. And there are PDF and image tools to merge, split, compress and convert files.
Students can work out their GPA, CGPA, attendance and university aggregate. Freelancers and small businesses can create invoices and payslips, and add or remove VAT. For Pakistan there's a section with the FBR salary tax calculator, zakat, electricity bill, gold price and petrol cost tools.
Every tool is free to use and needs no account. Results update as you type, and the pages are built to work well on a phone. When you use the PDF and image tools, your files are processed in your own browser and are never uploaded to our server, so private documents stay private.
We keep rates like tax slabs, electricity tariffs and exchange rates up to date. Even so, figures such as tax and bills are estimates, so for important decisions please confirm with the official source.
Frequently asked questions
Are all the tools really free?
Yes. Every tool on Custom Converter is free, with no sign-up, no trial and no limit on how many times you use it.
Do I need to create an account?
No. Just open a tool and start typing. Nothing is saved to an account because there isn't one.
Are my files safe when I use the PDF and image tools?
Yes. Your files are processed inside your own browser and never leave your device. We don't upload or store them.
How accurate are the results?
The calculators use standard formulas, and you'll find the formula on each tool page. Tax, zakat and electricity results are good estimates, but your final bill or tax can differ slightly because of adjustments, exemptions or rate changes.
How often are currency rates updated?
Exchange rates refresh automatically several times a day. They are mid-market rates, so your bank or money exchanger may offer a slightly different rate.
Is the FBR salary tax calculator up to date?
Yes. It uses the salaried income tax slabs for the 2026-27 tax year, and you can compare your tax with last year's.
Can I use the tools on my phone?
Yes. Every tool is designed for mobile first and works on any phone, tablet or computer with a modern browser.
I can't find the tool I need. Can you add it?
Probably. Send us a message through the Contact page and tell us what you need. Popular requests get added first.