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189 tools
This free furnace BTU calculator estimates how many BTUs are needed to heat a home based on square footage and climate zone. It provides BTU-per-square-foot guidance and practical sizing context for selecting heating equipment. The tool focuses on heating load rather than cooling load.
This free Rate of Return Calculator estimates annualized return from an initial value, final value, and investment length. It also supports interim periodic deposits or withdrawals, which makes it close to average-return tools that account for cash flows. The calculator is browser-based with no mandatory paid plan.
Free mortgage calculator to find monthly payment, total home ownership cost, and amortization schedule with options for taxes, PMI, HOA, and early payoff.
The scientific notation calculator converts decimals into scientific notation. Explore the rules of scientific notation for a thorough understanding.
This free height calculator predicts a child's adult height based on linear regression analysis. It can also convert between different units of height.
This GPA calculator computes GPA and generates a report based on course credits and the achieved grade. It accepts both numerical and letter grades.
Defuse’s Online Big Number Calculator supports arithmetic on very large values and includes base conversion and bitwise operators. It is free to use in-browser and is designed for high-precision or large-integer style calculations without requiring a paid plan.
This free date calculator computes the difference between two dates. It can also add to or subtract from a date. Both can deal with business days and holidays.
Free FHA loan calculator to find the monthly payment, total interest, and amortization details of an FHA loan, or learn more about FHA loans.
NerdWallet offers a free car lease calculator for estimating monthly payments and lease cost components from vehicle price, down payment, residual value, tax, and term assumptions. It helps users benchmark lease deals and understand the underlying inputs that drive total cost. The calculator is available on the public site without requiring a paid plan.
Online calculator to determine the final price after discount, the amount saved, or the original price before discount related to a discounted purchase.
Two free random number generators that work in user-defined min and max range. Both random integers and decimal numbers can be generated with high precision.
A random password generator to create strong and secure passwords. To ensure security, they are generated on the webpage without being sent over the internet.
Free down payment calculator to find the amount of upfront cash needed, down payment percentage, or an affordable home price based on 3 potential situations.
Free calculator to get the number of hours, minutes, and seconds between two times. Also, a full version to calculate the time duration between two dates.
This free dew point calculator calculates dew point, relative humidity, or air temperature if given any of the other two values.
Effortlessly determine speed, distance, and time using our speed calculator—a perfect tool for finding average speed for a given time and distance. Try it now!
This area calculator determines the area of a number of common shapes, including rectangle, triangle, trapezoid, circle, sector, ellipse, and parallelogram.
Free calculator to find both the front end and back end Debt-to-Income (DTI) ratio for personal finance use. It can also estimate house affordability.
Free calculator to evaluate student loans by estimating the interest cost, helping to understand the balance, and evaluating pay-off options.
Free boat loan calculator to determine the monthly payment and total cost of a boat loan, while accounting for sales tax, fees, trade-in value, and more.
This calorie calculator estimates the number of calories needed each day to maintain, lose, or gain weight. Learn the kinds of calories and their effects.
This pregnancy weight gain calculator provides a recommended weight gain schedule on a week-by-week basis based on pre-pregnancy bodyweight and IOM guidelines.
This free conception calculator estimates possible as well as most likely dates of conception, and their corresponding due dates over six menstrual cycles.
