Transparent formula
Spendable = max(0, balance minus reserve). Affordable units = floor(spendable divided by current unit cost). The remainder stays visible.
Cut a Gem Budget Calculator
Enter the balance and current unit cost shown in your live game. The calculator protects a reserve and returns affordable units, remainder, and target shortfall without hard-coding upgrade prices, gem values, buyer formulas, or probability.
Your current valuesNo hidden ratesRuns in your browser
Your live values
Set a safe workshop budget
Read the cost in the current game, choose a reserve that keeps the production loop working, and calculate locally.
Calculated locally
Equipment purchase budget
Enter a non-negative balance and a unit cost greater than zero. Use values from the current Cut a Gem interface.
No Roblox login is requested. No prices or odds are assumed. Results depend entirely on the values you enter.
Why the cost starts blank
A blank input prevents a price from another update, item, server, or guide from becoming an accidental recommendation.
What the calculator cannot predict
It does not predict purity, buyer offers, processing speed, offline capacity, upgrade effects, event rewards, or future prices.
Calculator questions
What does the Cut a Gem calculator do?
It converts your live balance, current unit cost, protected reserve, and target into affordable units, remaining cash, and any target shortfall.
Does it know current upgrade prices?
No. Enter the price displayed in your current game so an old or unrelated value cannot affect the result.
Does it predict purity or buyer offers?
No. It performs transparent budget division only and does not model unpublished odds, multipliers, offers, or event rewards.
Does it access my Roblox account?
No. The calculation runs in the browser and uses only the numbers you enter.