Flea Market Profit Calculator — Know your net earnings after deducting fees and shipping costs before listing

An Android app that lets you check how much money will be left in your hands before listing items on a flea market app.

Ever had these problems?

• After deducting shipping costs from the sale, I ended up with less than I expected
• I don't know whether to list on Mercari or Rakuma to get more profit
• I want to keep at least 1,000 yen, but I'm not sure what price to list it at

What you can do

• Calculate net proceeds: Enter the selling price, shipping method, and purchase price to see the profit and profit margin after deducting fees and shipping costs
• Compare flea market apps: Compare the net proceeds side-by-side for Mercari, Rakuma, and Yahoo! Flea Market at the same price
• Calculate backwards from your goal: Enter the profit you want to keep, and it calculates the listing price
• Shipping cost presets: Just select from options like Neko Poss, Yu-Packet, Takkyubin, etc., and they're automatically applied
• Display breakdown: Shows the proportion of purchase price, packing costs, fees, shipping, and profit in different colors
• Calculation history: Keep a record of your calculations and manage them in order: listing → sold → shipped → completed. You can also view monthly profits in a graph

Peace of mind features

• No account registration needed—start using it right away
• Your input data is saved only on your device
• All calculation features are free (ads are displayed; there's also a subscription plan to remove ads)

Download

Install from Google Play (Android).

▶ Google Playでフリマ利益計算ツールを見る

We'd love to hear from you

Feel free to comment with things like "I'd like this shipping option supported too" or "This part is hard to use." Your feedback will help us with future updates.

※The fee rates and shipping costs are estimates based on official information from each flea market app. Since they may change, please also check the latest information from each service before listing.