Calculators for US numbers
CalculPulse is a set of free calculators and converters. The English pages use US conventions: pounds, inches, miles, Fahrenheit, US gallons, and dollars, with a comma for thousands and a point for the decimal. A kilogram still converts with the exact international pound, 0.45359237 kg, and an inch is still exactly 2.54 centimeters. The shortcuts (“times 2.2”, “times 1.6”) are explained on each page so you can see how far they sit from the legal factor.
The calculators cover the arithmetic that shows up in a price, a grade, a room, and a short-term loan. The percentage calculator finds a part, a rate, or a whole. The percentage increase calculator compares two numbers and applies a percent change. The discount calculator takes a percent off and shows what two stacked discounts really remove. Margin separates profit margin on the selling price from markup on the cost, which are not the same percent.
What each group is for
Each tool is one page with its own address, so you can come back to “kg to lbs” or “square footage” without hunting through a menu. The page states the formula, walks through one example with the arithmetic written out, and answers the questions people ask after the first result. Tables list the values that come up most often, such as 70 kilograms in pounds or a 12 by 15 foot room.
- Percentages: a share of a number, a percent increase or decrease, and a sale price.
- Math: proportions, averages, weighted averages, standard deviation, square roots, Roman numerals, and numbers spelled in American English.
- Home and money: square footage in feet and inches, profit margin, and simple interest on a principal.
- Converters: kilograms and pounds, centimeters and inches, Celsius and Fahrenheit, kilometers and miles, and US gallons and liters.
How a page is meant to be used
Type into the boxes. There is no submit button. If a field is blank or not a number, the result stays empty instead of guessing. Decimals use a point, and you can type a thousands comma: 1,250.50 is one thousand two hundred fifty and a half. On the number-to-words page that amount, as dollars, is spelled for a check. On the Roman numeral page, 2026 is MMXXVI and 4 is IV.
Read the worked example before you trust a surprising result. The usual slip in a conversion is running it backwards. The usual slip in a percentage increase is dividing by the new number instead of the old one. The usual slip in margin is dividing profit by the cost and calling it a margin. The examples are chosen so those checks are concrete: 70 kg is 154.32 lb, 180 cm is 70.87 inches, and a $50 cost sold at $80 is a 37.5% margin.
Private by design
Every calculation runs in your browser. The numbers you type are not sent to a server and are not stored by CalculPulse. Close the tab and they are gone. That includes grades, a cost and a price, a principal, and a weight. The pages are still only arithmetic. They are not tax advice, a loan offer, or a medical reading. A body-weight conversion does not interpret the number, and a simple-interest result is not a payment schedule for an amortizing loan.
CalculPulse is published by Maketru. The French edition of the site, at the same domain without the /en/ path, has additional tools that are specific to France. The English pages do not translate those. Use the EN link in the header to move between a page and its French counterpart when one exists, or back to the other language’s home when it does not. Nothing here redirects you based on where you are.