Loan Prepayment Analyzer - Online Interest Savings Calculator
See how making extra payments reduces tenure and saves interest. Visual graph comparing original vs prepaid amortization. Purely local financial tool.
UD5 Toolkit
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See how making extra payments reduces tenure and saves interest. Visual graph comparing original vs prepaid amortization. Purely local financial tool.
Compute simple interest and final amount given principal, annual rate, and duration. Also reverse-calculates rate or time. Local only.
Project how your savings and investments grow over time with compound interest. Interactive chart and detailed table. Free and anonymous.
Find the CAGR of an investment given start and end values over a time period. Instant growth rate.
Enter number of emitters and their GPH to calculate total water delivered and optimal run time for your plants.
Estimate the total price after adding US state sales tax. Select state, enter amount, and see breakdown. Simple and quick, perfect for shoppers.
Quickly find the final price after a percentage discount. Also works in reverse to find the original price. Handy for budget shoppers.
Enter length or period to find the other. Visual swinging animation. Quick physics reference.
Select rice type and number of cups to get exact water measurement. Perfect fluffy rice every time.
Estimate daily hay and grain needed for a horse based on weight and workload. Follows 2% body weight rule. Educational reference.
Create your own oral rehydration solution by mixing salt, potassium, and sugar to WHO formula. Convert to teaspoon amounts.
Adjust material types (leaves, grass) to achieve the ideal 30:1 C:N ratio. Improve compost bin performance. Local only.
Calculate airflow in cubic feet per minute given velocity and duct diameter. Simple HVAC reference. Local only.
Enter cabinet width and find optimal placement for knobs or pulls. Visual layout with grid. Achieve professional look.
Perform common percentage calculations: find percent of a number, percentage increase/decrease, and more. Simple, fast, and always available for free.
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.
Based on move size, hours, and crew, estimate appropriate tip per mover. Quick reference.
Compare stick models by length, diameter, and taper. Find the perfect balance for your playing style.
Select mortar type (N, S, M) and area to calculate materials needed. Bricklaying helper.
Estimate required CFM for your dust collector given machine port size and length. Woodshop aid.
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.
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.
Compare time and equipment cost to hiring a plow service. Fun winter economics.
Calculate the tube length for each note of a pan flute given inner diameter. Build your own instrument.
Generate a stitch‑by‑stitch increase pattern for any number of rounds. Ensure your amigurumi or mandala lies perfectly flat.
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.
Create a printable SIPOC diagram for your process improvement project. Fill in boxes, export as image.
Convert speed units such as miles per hour, kilometers per hour, knots, and meters per second. Accurate and quick, works offline in your browser.
Enter a hook size in any system and instantly see the equivalent in all other standards.