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Work out the plan before you spend

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Four of them: spend plan, unit economics, customer value, and which lever to pull.

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01 · Spend plan

You have a revenue target for next month. This works backwards from it: how many orders, how many visitors, and therefore how much ad budget you actually need.

Revenue target for the monthWhat you want the business to bill
Average order valueTotal revenue ÷ number of orders
Conversion rateOrders ÷ sessions. 1–2% is typical to start%
Cost per clickWhat you pay for one visitor from ads
Gross marginRevenue left after product cost%
Share of revenue from paid adsThe rest comes from organic, email, repeat%
Ad budget you need this month
Orders needed
at your average order value
Total sessions needed
visitors across all channels
Paid sessions to buy
clicks you're paying for
Cost per order (CAC)
ad spend ÷ paid orders
ROAS you must hit
paid revenue ÷ ad spend
Break-even ROAS
below this you lose money

How to phase it across the month

Weekly
WeekBudgetPer dayExpected orders
Week 1 is deliberately lighter. New campaigns spend badly while they learn — give them a small budget for 5–7 days, kill what doesn't work, then scale into weeks 3 and 4.