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Free Online Calculators & Everyday Tools
QuickConvertLab has free calculators for money, pay, dates, home, and school. Every tool works at once. You do not need to sign up. The results use common formulas that anyone can check. Pick a group below to find the tool you need.
Finance & Loans Salary & Business Student & Exams Date & Time Home & Everyday Electrical & Physics Math & Geometry
Finance & Loans
Plan loans, leases, and savings with clear numbers. These tools show what a loan may cost each month. They also show how much interest you may pay in total. Try a few different amounts to see the change.
- Home Affordability Calculator
- Property Cost & Investment ROI Calculator
- Home Lease Calculator
- Auto/Car Loan Calculator
- Auto/Car Lease Calculator
- Lease Calculator
- Monthly Payment Calculator
- Future Value Calculator
- Present Value Calculator
- Payback Period Calculator
- Depreciation Calculator
- Bond Calculator
- RD (Recurring Deposit) Calculator
- Policy Premium Calculator
- Subsidy Calculator
- GDP Calculator
- Discount Calculator
- IBAN Checker
Salary & Business
See how your pay and benefits add up. Check your take home pay after a raise. Work out your gratuity for the years you have worked. These tools help you plan before you talk to your employer.
- Salary Hike Calculator
- Take Home Salary Calculator
- Basic Salary Calculator
- Gratuity Calculator
- NPS (Net Promoter Score) Calculator
Student & Exams
Change grades into percents and score your exams the right way. Type in your marks and see the result in a second. These tools save time during result season.
- SGPA to Percentage Calculator
- CGPA to Percentage Calculator
- Negative Marking Calculator
- Reading Time Calculator
Date & Time
Find your age, the days between two dates, or the time between two points. These are handy for forms, plans, and special days.
- Age Calculator
- Birthday Calculator
- Date Difference Calculator
- Day Calculator
- Time Calculator
- Calendar Calculator
Home & Everyday
Get quick numbers for your home, your trips, and your bills. You can find how many tiles a room needs. You can also check what a trip may cost in fuel.
- Tile Calculator
- Land Area Calculator
- Electric Bill Calculator
- Fuel Cost Calculator
- Mileage Calculator
- Heat Index Calculator
- Bandwidth Calculator
Electrical & Physics
These tools use simple formulas from school books. They help students, hobby makers, and workers. Type in the values you know and the tool finds the rest.
- Ohm’s Law Calculator
- Voltage Drop Calculator
- Voltage Calculator
- KW Calculator (Electric Load)
- Power Calculator
- Energy Calculator
- Horsepower Calculator
- Resistor Color Code Calculator
- Series/Parallel Resistance Calculator
- Capacitor Calculator
- Inductor Calculator
- Force Calculator
- Torque Calculator
- Speed Calculator
- Distance Calculator
- Density Calculator
- Viscosity Calculator
- Flow Rate Calculator
- Sound Calculator
Math & Geometry
Do quick sums for percents, fractions, and averages. You can also find the area or the edge length of a shape. Each tool shows the answer at once.
- Percentage Calculator
- Fraction Calculator
- Average Calculator
- Proportion Calculator
- Permutation Calculator
- Math Calculator
- Casio Calculator
- Area Calculator
- Surface Area Calculator
- Perimeter Calculator
How to Use These Tools
Open a calculator from the list. Type your numbers in the boxes. Tap the button to see the result. You can change a number and try again as many times as you like. Each page also has a short guide and a sample. Read it if you are not sure what to type.
Tips for Good Results
Check your numbers before you tap the button. Use the same unit in every box. Round your answer only at the end. Remember that every result is an estimate. For big choices, ask an expert too. If you find a mistake, please tell us on the contact page.
Quick Questions
Are these tools free? Yes. All tools on this site are free to use.
Do I need to sign up? No. You can use every tool at once.
Can I use the tools on my phone? Yes. They work on phones, tablets, and computers.