Excel Glass Firing Calculator

Excel Glass Firing Calculator

At the bottom of this page is a link to a Microsoft Excel spreadsheet for your kiln-glass firing schedules.

Using this tool, you can:

  • Plan your schedule segments (ramps and holds)
  • Estimate how long each segment will take
  • Estimate when a segment will reach a target temperature
  • Estimate the total time for the entire firing
  • Add notes and pictures

The schedule automatically recognizes if you enter a temperature rate change (*ramp) that exceeds what the kiln can achieve (based on the values you enter on the “Max Ramp” tab).

If you enter an unachievable rate (up or down), the schedule will highlight the cell in orange AND use the maximum possible rate to determine segment duration. This should yield considerably better estimations for segment and schedule completion times.

Best of all, this spreadsheet is free.  It requires that you own or have access to Microsoft Excel.



This software is provided “as is”, without warranty, and with all faults.

This software is intended to estimate firing schedules and may, through a lack of precision and/or due to defect, provide grossly inaccurate data. You are ultimately responsible for determining your firing schedule.

Kilns should never be left to run unattended.


I agree to the above and wish to download the software.

Version for MS Excel
Versions 97 – 2003

Version for MS Excel
Versions 2007


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