Most game calculators work because somebody published the formula. Prehistoric Farm has not been out long enough for that, and nothing resembling a payout table exists in any primary source. So these three run the other way round: you supply the observation, the tool does the arithmetic and the projection.
Earn rate
The headline number. Converts one measured run into an hourly rate and projects it across whatever session length you have in mind.
Currency per hour
Nothing here is pre-filled with game data. The maths is plain division; the code is in src/calculators.
Enter your own numbers above to recalculate.
Time to a savings goal
Useful the moment you are staring at something expensive — a boat, a tool, an unlock — and want to know whether it is a tonight purchase or a weekend one.
How long until you can afford it
Enter the price you can see in your own game. We do not publish prices, because none have been.
Enter your own numbers above to recalculate.
Dig throughput
Digging is the front of the whole loop, so how many digs fit in your session is often the real constraint. Pair it with your green-zone hit rate from the timing trainer.
Digs and green-zone releases per session
Time one complete cycle — the dig itself plus walking to the next spot.
Enter your own numbers above to recalculate.
Using the results without fooling yourself
Three habits keep these honest.
Measure twice. One run is noisy — a lucky find or a long walk can swing it badly. Average two or three before you trust the hourly figure enough to plan around it.
Re-measure after any upgrade. The whole point of a tool or boat purchase is that it changes the rate. An earn-rate figure from before an upgrade is stale the moment you buy.
Compare like with like. A rate measured on a new island is not comparable to one from your home island, and a rate measured while also feeding dinosaurs is not comparable to a pure digging run.
Sources: no game data is used by these tools. The formulas are plain arithmetic over your own inputs and can be read in this site’s source. See our editorial policy.
Questions
Frequently asked questions
Why are the calculators empty?
Because Project Mirvy has published no payout rates, sale prices or production values. A calculator pre-loaded with invented numbers produces invented answers with a confident interface around them, which is worse than no calculator.
Where do I get the numbers to put in?
One timed run of your own. Note what you banked and how long it took, and every tool on this page has what it needs.
Can you see what I type here?
No. The arithmetic runs in your browser, nothing is sent anywhere, and nothing is stored. There are no analytics on this site at all.