Wood Glue Open Time Calculator
Glue open time shrinks in hot, dry conditions and stretches in cool, humid ones. Enter your glue type and shop conditions to estimate how many minutes you have to assemble and clamp your project.
Estimated Open Time
—
Base Open Time (min)—
Temperature Factor—
Humidity Factor—
Estimated Open Time (min)—
About this calculator
Estimate how much working time you have to assemble and clamp a glue-up before the adhesive begins to set, based on glue type, temperature, and humidity.
Frequently Asked Questions
Why does temperature shrink glue open time?
Heat speeds up the chemical curing and water evaporation process in most wood glues, reducing the window for repositioning and clamping.
Does humidity really extend open time?
Yes, for water-based glues like PVA, higher humidity slows evaporation, which keeps the glue workable longer.
Is this estimate exact for every brand?
No, always check the manufacturer's data sheet — this tool gives a general planning estimate for typical workshop conditions.