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DCA average cost calculator

Lumen editorial team· Runs in your browser · no data collected

After buying in batches, a lot of people can't actually say what their real cost is. Log each buy's amount and price, and this works out your average cost — and whether you're up or down at the current price.

Each of your buys
Amount invested (USDT) Buy price Remove
Enter the market price you see now to calculate floating P/L.
USDT
Total invested
0.00USDT
Total coins
0
Average cost
0.00/ coin
Current value
0.00USDT
Floating profit / loss
0.00USDT · 0.00%
Your average cost vs the current price
Average cost0.00
Current price0.00
Floating P/L 0.00 0.00%
How DCA smooths out your cost Buying in batches means you buy less when the price is high and more when it's low, so your average cost lands somewhere in the middle — you never have to call the exact bottom. That's the big difference from going all-in: all-in bets that you bought at the right moment, and if you buy at a high, you're stuck holding. To weigh the trade-offs of each approach, read DCA vs going all-in.

This tool only estimates for illustration; it predicts no price path and is not investment advice. The calculation runs entirely in your browser — the numbers you enter are never collected or uploaded.

Why it's worth tracking your DCA cost buy by buy (expand)

Dollar-cost averaging sounds simple — buy a little every so often. But after a few buys, plenty of people lose track: am I actually up or down right now? What's my average cost? The "roughly what I paid" you carry in your head is usually well off the real number. This tool doesn't predict the future; it just makes the past clear: how much you put in, how many coins you got, the average price per coin, and whether you're up or down at today's price.

How to read these numbers

Average cost is the core: it flattens all your buys into a single price. As long as the current price is above your average cost, you're up; below it, you're down. The floating P/L and P/L% show your position at a glance — and note the word "floating": until you sell, it's all on paper and will jump around with the price. The point of watching these isn't to ride your emotions daily, but to confirm your pace is right and that you haven't drifted from the plan you set.

DCA isn't a sure win, but it solves a real problem

DCA's biggest value is helping you sidestep timing — something almost no one gets right consistently over the long run. Going all-in bets that you happened to buy at a good moment; buy at a high and you're left holding it. Buying in batches spreads your entry over time, and when the price is low the same money buys more, which naturally pulls your average down. But to be clear: it doesn't guarantee a profit — if the asset falls over the long term, DCA just makes you lose more slowly. It manages your pace and emotions, not your direction.

Common mistakes

One is treating floating gains as money already in hand, then panicking on the first pullback. Another is adding more the moment you see a floating loss to "lower the average," which breaks the very amount and rhythm you set — once the discipline goes, DCA is DCA in name only. A third is DCA-ing into an asset you don't understand at all, assuming "DCA fixes everything"; it only optimizes how you buy, and the wrong pick still loses. To think it through, read DCA vs all-in first, then use the pre-flight checklist to confirm you've got the basic security and mindset in place.