You already know the formulas — what you need is speed in front of a client and clean numbers to screenshot into a memo. Every tool here runs instantly, shows its working, and needs no login.
Yes — the outputs are plain numbers you can copy anywhere. For client-facing sites, every calculator also has a free embed snippet, useful for firm resource pages.
Run their fixed costs, price, and unit cost through the break-even calculator. If break-even units exceed plausible market volume, the pricing conversation happens now instead of after the quarter closes.
Two runs of the compound interest calculator: start now vs start in five years, same monthly amount. The five-year delay typically costs six figures at retirement on modest contributions — that screenshot ends the debate.