Profit calculator vs spreadsheet
A profit calculator speeds a unit estimate; a spreadsheet stores assumptions over time. Neither replaces marketplace payout reports.
What the calculator is for
CrossKit Profit Calculator is a browser model: price, landed cost, fees, shipping, ads, returns. It is useful before a purchase order, when comparing FBA vs FBM, or when a coupon changes. It does not log into Seller Central, does not invent revenue, and is not an official Amazon calculator.
What the spreadsheet is for
A sheet remembers last month’s TACOS, the dated FX rate, and which SKU used which size tier. It can hold two channels side by side without overwriting a form. Spreadsheets fail when formulas drift, when someone types markup in a margin column, or when ads live in someone’s head instead of a cell.
A fair hybrid
Run the unit math in the calculator when you change one assumption. Paste the result into a named scenario row on the sheet. Restock from after-ad contribution, not from a fee-only leftover. If the bank never sees the $8 the tool showed, a line was omitted—fix the inputs, do not blame the window.
When a paid accounting tool is the next step
Pay for live fee APIs, inventory lots or bookkeeping exports when you need them. For launch yes/no and coupon math, a free browser calculator plus a sheet of assumptions is enough. This page does not assign star ratings to unnamed spreadsheet add-ons.
Related CrossKit tool
Profit Calculator
Open this browser tool after you read the article.
Frequently Asked Questions
Can a spreadsheet replace Profit Calculator?
Yes, if you maintain the formula. Many teams still want a form that cannot silently drop the ads line. Use both.
Is the calculator more accurate?
Accuracy is the fees and FX you typed. A calculator that hides ads will always “win”. Prefer the workflow that makes you enter the ugly lines.
Does CrossKit sync my Google Sheet?
No. Copy numbers yourself. That is intentional: the model stays a planning estimate, not a hidden books integration.