How to Use a Bitcoin Mining Calculator Before You Buy a Miner

Before you buy a Bitcoin miner, check what it could actually earn. This quick guide uses the free mining calculator on oneminers.com with the Antminer S21e XP Hyd 3U (860 TH/s, hydro cooled) and shows where to find each number.

Try it yourself in 3 steps

1. Pick your miner. Choose the Antminer S21e XP Hyd 3U, or any other miner you are considering. Its hash rate and power use are already filled in for you.
2. Enter the electricity rate. This is the only number you need to type in. To find the real rate, look at the hosting rate on the OneMiners site for the location you want. The hosting sites guide explains where to look.
3. Read the estimate. The calculator shows daily earnings, power cost, net per day and payback time, based on today’s Bitcoin price and network difficulty.

What the numbers mean

• Daily earnings: what the miner could produce in a day.
• Power cost: what the electricity for that day costs at your rate.
• Net per day: earnings minus power cost.
• Payback time: how long it would take the net earnings to cover the price of the miner.

In the video example, a hosting rate of 5.5 cents per kWh gave a payback estimate of roughly 12.5 months. That figure moves whenever Bitcoin’s price or network difficulty changes, so treat it as a snapshot, not a promise.

Why electricity matters so much

Change only the electricity rate and watch the net number move. A cheaper hosting site can turn a slow payback into a faster one. Compare sites before you decide, and read how to pick a Bitcoin miner for the other things to check.

Next step

When the numbers look right, follow how to buy a miner on OneMiners.

Estimates depend on market conditions and may differ from real results. This guide is for information only and is not financial advice.