Before profit, before taxes, before anything else, a business has revenue: the total cash its sales bring through the door. Price times quantity sold is the entire formula, and every financial statement in America starts on that line. A coffee shop selling 200 lattes a day at $5.50 books $1,100 of daily revenue -- a number that feels great until the costs below it get subtracted.

This calculator evaluates your two values and returns the revenue figure. Enter the selling price per unit in the Variable A field and the number of units sold in Variable B -- 5.50 and 200 for the coffee shop -- and the Result shows the top line instantly. It is deliberately simple, because revenue's job is to be the clean starting point every other metric builds on.

Founders use it to sanity-check goals. Need $10,000 a month from a $25 product? That is 400 sales, or about 13 a day -- suddenly the marketing plan has a concrete target. Run the price and volume combinations before committing to inventory, ad spend, or a lease, and you will know exactly what "a good month" has to look like in units, not wishes.

With the pre-filled defaults — Variable A 10, Variable B 5 — the Revenue Calculator returns Result 50.0000. Change any input and those results update instantly, so you can see exactly how each number you enter moves the answer.