Percentage Calculator - Online Find Percent, Increase & Decrease
Perform common percentage calculations: find percent of a number, percentage increase/decrease, and more. Simple, fast, and always available for free.
UD5 Toolkit
Quickly calculate sale price, savings, and discount percentage.
Perform common percentage calculations: find percent of a number, percentage increase/decrease, and more. Simple, fast, and always available for free.
Compute simple interest and final amount given principal, annual rate, and duration. Also reverse-calculates rate or time. Local only.
See how making extra payments reduces tenure and saves interest. Visual graph comparing original vs prepaid amortization. Purely local financial tool.
Project how your savings and investments grow over time with compound interest. Interactive chart and detailed table. Free and anonymous.
Estimate the total price after adding US state sales tax. Select state, enter amount, and see breakdown. Simple and quick, perfect for shoppers.
Compare time and equipment cost to hiring a plow service. Fun winter economics.
Calculate monthly EMIs for any loan type and see the detailed amortization schedule. Compare different interest rates and tenures with instant results.
Based on move size, hours, and crew, estimate appropriate tip per mover. Quick reference.
Find the CAGR of an investment given start and end values over a time period. Instant growth rate.
Enter product size and price for two items to see true cost per unit (oz, lb, ml, etc.). Always find the better deal. Quick local math.
Adjust material types (leaves, grass) to achieve the ideal 30:1 C:N ratio. Improve compost bin performance. Local only.
Enter number of emitters and their GPH to calculate total water delivered and optimal run time for your plants.
Convert speed units such as miles per hour, kilometers per hour, knots, and meters per second. Accurate and quick, works offline in your browser.
Calculate required bags of cement, sand, and gravel for a given concrete volume using standard mix ratios (1:2:4, etc.). Supports metric and imperial.
Estimate daily hay and grain needed for a horse based on weight and workload. Follows 2% body weight rule. Educational reference.
Compare stick models by length, diameter, and taper. Find the perfect balance for your playing style.
Enter length or period to find the other. Visual swinging animation. Quick physics reference.
Select mortar type (N, S, M) and area to calculate materials needed. Bricklaying helper.
Enter cabinet width and find optimal placement for knobs or pulls. Visual layout with grid. Achieve professional look.
Create your own oral rehydration solution by mixing salt, potassium, and sugar to WHO formula. Convert to teaspoon amounts.
Estimate how much agricultural lime or elemental sulfur to add to change soil pH by a target amount. Based on soil type and current pH. Educational.
Select rice type and number of cups to get exact water measurement. Perfect fluffy rice every time.
Mix your own feed by entering grain percentages and see the resulting crude protein. Formulate a balanced diet for your flock.
Calculate water and soda ash needed to pre‑soak fabric for tie‑dye. Achieve vibrant, long‑lasting colors.
Find safe mixing ratios for the classic elephant toothpaste demonstration. Volume adjustments for different container sizes.
Generate printable math worksheets for addition, subtraction, multiplication, and division. Choose difficulty and number of problems. Answer key included.
Estimate required CFM for your dust collector given machine port size and length. Woodshop aid.
Calculate airflow in cubic feet per minute given velocity and duct diameter. Simple HVAC reference. Local only.
Calculate the tube length for each note of a pan flute given inner diameter. Build your own instrument.
Find essential Visual Studio Code shortcuts for Windows, Mac, and Linux. Filter by category. Boost your coding speed with this reference.