How to use this tool
Replace the example values with your own inputs. Results update as you type. Keep your measurement period and definitions consistent, then use the result to inform the next question in your advertising review.
The formula
Expected spend = budget × elapsed days ÷ period days. Remaining daily budget = remaining budget ÷ remaining days.
Worked example
With 10,000 planned, 4,200 spent and 18 of 30 days left, the remaining daily budget is 322.22.
What the result can tell you
This assumes even pacing. Promotions, weekends and delivery changes can justify a different schedule. A negative remaining budget indicates overspend.
Is it free, and where do my inputs go?
The tool runs in your browser without an account or an ad-platform connection. Calculation inputs are not sent to WhatWins. If you save a scenario, it stays in this browser on this device.