Calculate kimchi premium after fees and costs

Separate the buy budget from total cost

The calculator includes the buy fee inside the buy budget. Additional withdrawal or FX costs are paid on top of that budget in KRW. Total cost is the buy budget plus those additional costs.

Quantity = budget ÷ [KRW buy price × (1 + buy fee rate)]. Net sale proceeds = quantity × KRW sale price × (1 − sell fee rate). Profit or loss = net sale proceeds − total cost.

A worked example with a 2% price gap

Assume a 1,000,000 KRW budget, a 100,000 KRW buy price, a 102,000 KRW sell price, a 0.1% buy fee, a 0.05% sell fee and 5,000 KRW in extra costs. These are examples, not current exchange fees or quotes.

The quantity is about 9.99001 coins and net sale proceeds are about 1,018,472 KRW. Subtracting the 1,005,000 KRW total cost leaves about +13,472 KRW, or +1.34%. This is why a 2% displayed gap is different from the result after costs.

If extra costs instead reach 20,000 KRW, the same scenario loses about 1,528 KRW. Fixed withdrawal costs have an especially large effect on small budgets.

Understanding break-even price

Break-even sale price = total cost ÷ [quantity × (1 − sell fee rate)]. GimpApp expresses it in KRW per coin. When selling overseas, divide this number by the entered FX rate to compare it with an overseas quote.

Fees deducted in coins can change the actual quantity delivered. The fixed-cost field simplifies them to a KRW expense; it is not an exact settlement model for every fee mechanism.

Use your actual conditions

Select a coin, domestic exchange and direction, then load current prices. Loaded figures stay fixed while you compare assumptions. Load them again to capture the latest received prices and reference FX.

Default fees are illustrative. Enter the rates for your tier, discount and order type. Check bank conversion spreads, withdrawal charges, network fees and the cost of returning funds. Shared links contain your inputs, so check any sensitive amounts before sharing.