z-index Calculator
Generate clean tiered z-index values from a list of layer names. Enter your values, click Calculate, and get the full result with its breakdown — everything is processed on your device, nothing is sent to a server.
All calculations run in your browser. Your data is never sent to our servers.
Example
Example Input
base / dropdown / modal
Example Output
base: 10, dropdown: 20, modal: 30
How to Use
- 1Fill in each input field with the values you want to compute.
- 2If there are choices (units, mode, operation), pick what you need.
- 3Click the Calculate button (or press Ctrl+Enter).
- 4The main result and its breakdown appear in the Result area. Click Copy to copy it.
About the z-index Calculator
The z-index Layer Calculator helps standardise stacking contexts: enter layer names (e.g. base, dropdown, modal, toast) and get tiered z-index values (multiples of 10) in order. This prevents "z-index wars" with random values like 9999.
Useful for keeping a consistent layering system across a large project.
FAQ
Is this z-index Calculator accurate?
Yes. It uses standard formulas and runs directly in your browser at full JavaScript precision (plus BigInt/decimal.js for large numbers where needed).
Is my data sent to a server?
No. All calculations happen entirely on your device. No values are sent to or stored on our servers.