Calculate speedup inventory
Enter the quantities of speedups in your inventory below by their duration. Empty fields count as zero. Selecting “Universal”, “Building”, “Research”, and “Training” is only a result label; the minute calculation is the same for every type. To avoid mixing different types into a single total, select one type and enter only the quantities for that type. Verify in-game whether Universal speedups can be used for the relevant process.
Inventory total
Construction time
Enter the base time and the bonus shown on your game screen. Only fill in help details if you know them.
Results are rounded up to the nearest full minute. The remaining time on the game screen should be taken as the basis.
How to use the calculator?
First, open your inventory and count the durations one by one. For example, enter the count of five-minute items in the “5 min” field; do not re-enter the duration. With each change, the total days, hours, and minutes are displayed again. If you are planning a construction, enter only the speedups you can spend on that construction. When calculating for research or training, switch the type label and update the inventory fields with items that can be used for that process. The selection does not automatically convert entered quantities or store separate inventories.
In the second section, enter the base time of the construction in days, hours, and minutes. Add the construction speed bonus as a percentage. If you know how many minutes help reduces in the game, enter the number of helps and minutes per help as well. These two fields are initially blank; no universal value is assumed for help duration. If help has not arrived yet, enter the current number of helps; do not count expected helps as already received. The last line explains whether the inventory total is sufficient for the remaining construction time, showing the difference in minutes.
Formula and example calculation
The speedup total is the sum of each item's minute value multiplied by its quantity. One day is 1,440 minutes, and one hour is 60 minutes. For construction, the base number of minutes is first divided by 1 + bonus / 100. Next, number of helps × minutes per help is subtracted; the result cannot drop below zero. Finally, available speedup minutes are subtracted from the remaining time to find the deficit or surplus. If there is any discrepancy with the estimated completion time on screen, use the time shown in the game.
For example, assume the base time is 10 hours and your construction speed bonus is 50%. 600 / 1.5 = 400 minutes, which equals 6 hours 40 minutes. Suppose you verified from the game screen that each of two assists reduces the time by 10 minutes. In this example, the remaining time is 380 minutes, or 6 hours 20 minutes. If your inventory contains one 3-hour accelerator and one 5-minute accelerator, that totals 185 minutes; you would need another 195 minutes to complete the construction. The assist minutes here are merely an example input, not a fixed rule for the game.
Compare the result with the in-game timer
The calculation assumes that the entered base time does not yet include the bonus. If the game screen already displays the remaining time after applying the bonus, do not apply the same bonus again to that value. Assist effects, events, and other time changes can affect the displayed value. The actual remaining time shown by the game is always a more reliable starting point for decisions. Before spending accelerators, double-check the usable speedup types and the final remaining time.
You can read about the prerequisites for upgrading your HQ in the Last War HQ upgrade guide. Return to the Last War Bot homepage for the site and other tools. This calculator runs on your device; it does not save inputs and resets when you refresh the page.