Worked exampleExported from Calvance
3D Printing Material & Electricity
Use filament weight and print duration from your slicer to estimate material and electricity costs separately, then add the two expenses.
View template and methodEquipment Rental vs Purchase
Compare repeated rentals with buying equivalent equipment and accessories. Find the first whole rental count that reaches the purchase outlay.
Worked exampleExported from Calvance
Exported by the iOS App After importing, edit the numbers in Calvance.
When to use it
Compare equivalent equipment for the same job. Enter one complete rental quote per use, including its non-refundable mandatory charges. Use the same assumed rental duration and package for every use. This example uses simulated USD prices, not current market quotes.
Inputs
USD
| Inputs | Default |
|---|---|
| Equipment (USD) | 1,200 |
| Accessories (USD) | 150 |
| Per rental (USD) | 80 |
| Uses | 10 |
Calculation method
Purchase outlay = equipment + necessary accessories. Rental total = full rental quote × uses. Difference = rental total − purchase outlay. Round purchase outlay ÷ rental quote up to the first whole count at which rentals cost at least as much.
1,200 [Equipment USD] + 150 [Accessories USD] → Purchase cost USD
80 [Per rental USD] × 10 [Uses] → Rental total USD
Rental total USD-Purchase cost USD → Rent minus buy USD
ceil(Purchase cost USD/Per rental USD) → Rental threshold
Change one input
Change planned uses from 10 to 20. Rental total and the difference update, while purchase outlay and the rental-count threshold stay unchanged.
| Result | Default | Changed |
|---|---|---|
| Purchase cost (USD) | 1,350 | 1,350 |
| Rental total (USD) | 800 | 1,600 |
| Rent minus buy (USD) | -550 | 250 |
| Rental threshold | 17 | 17 |
Results are displayed to at most two decimal places; later formulas use unrounded values.
Scope and limits
- Compare equivalent equipment and coverage.
- Exclude refundable deposits from expense.
- Resale value, maintenance and financing are not included.
Equipment and accessory prices must be nonnegative, the full rental quote positive, and uses a nonnegative integer. Include mandatory purchase charges in the purchase inputs. A positive difference means rentals cost more on this limited basis; it is not an investment payback calculation.
Download and import into Calvance to edit the numbers. The canvas does not reject every invalid input; check the stated ranges.
Common questions
Does the threshold mean I should buy?
No. It compares the stated cash expenses only. Resale value, maintenance, changing needs and the convenience of renting may change your decision.
How to import your template
We recommend using the latest version of Calvance.
- Save the file. Choose Download template and save the .calvx file to Files on your iPhone or iPad. From a computer, you can send it to your device with AirDrop.
- Open Import. In All Canvases in Calvance, tap the add button to open the template screen, then choose Import.
- Choose the file. Select the saved .calvx file to create your own canvas. Importing uses one canvas from your allowance.
- Edit and check. Check the results against the worked example, then add your numbers. Duplicate the canvas to keep different versions.
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Worked exampleExported from Calvance
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Separate canvases.
Choose a plan when you need more canvases, high-resolution image exports, or sync across devices.