NowClaude Opus 5.5 is live — the solo founder playbook.

Simple SaaS calculators

Quick planning tools for MRR, margins, pricing, and runway.

Inputs

Your business snapshot

Monthly recurring revenue$10,000Monthly operating costs$2,500Customers100Cash available$30,000

ARR

120,000

Operating margin

75.0%

MRR / customer

100

Cash runway

12.0 months