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Kiln Schedule FinderDrying Time and Temperature Schedule

Find the recommended kiln drying schedule for your species and thickness. Estimates total drying time, temperature steps, humidity targets and the risk of defects for a safe, efficient dry.

Time + Temp ScheduleThickness-BasedDefect Risk WarningSpecies Severity ClassPDF Report
KS

Kiln Schedule Finder

Drying Time and Temperature Schedule

Charge Details

Sets drying severity class.

mm

Drying time rises with thickness squared.

Moisture Targets
%
%
OK
Recommended Kiln Schedule
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days
Est. Drying Time
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deg C
Max Dry-Bulb Temp
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steps
Schedule Steps
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risk
Defect Risk
StepMC RangeDry-BulbWet-BulbTarget EMC
Schedule Calculation
About Kiln Schedule Finder
A kiln schedule is a step-by-step plan of temperature and humidity that gradually removes moisture from wood without causing checking, honeycomb, collapse or case-hardening. Dense, refractory species like Teak and Oak need gentle schedules; permeable softwoods can be dried fast. This tool estimates total drying time and the temperature/humidity steps based on species, thickness and target MC.
Where Is This Used?
Commercial Kiln OperatorsSawmill Drying YardsFurniture FactoriesTimber ImportersSolar Kiln ProjectsDrying Quality Control
Formulas Used
Drying time ~ k x Thickness^2 x severity_factor x ln(MC1/MC2)Thicker boards: time scales roughly with the square of thicknessSchedule steps decrease wet-bulb (raise temp) as MC dropsTarget EMC at each step is set ~2-4% below current wood MCKiln type factor: Vacuum ~0.3x, Conventional 1.0x, Solar ~1.8x time
Frequently Asked Questions
Why does Teak need a gentler schedule than Pine?
Teak is dense and refractory - water moves slowly through it. Forcing it dry too fast traps moisture in the core while the surface shrinks, causing surface checks and honeycomb. Permeable softwoods like Pine release water freely and tolerate high temperatures and fast schedules.
What is wet-bulb depression and why does it matter?
The gap between dry-bulb and wet-bulb temperature sets the kiln humidity (and thus the EMC the wood is driven toward). A small depression keeps humidity high for gentle early drying; a large depression at the end drives wood to low final MC. Getting this wrong causes the most common kiln defects.
How accurate is the time estimate?
This is a planning estimate based on standard severity classes and the thickness-squared rule. Actual time depends on airflow, stacking, initial MC variation and kiln efficiency. Always confirm with sample board MC readings - this tool gives you the schedule structure and a realistic baseline.
ResourcesView the formulasFormula Library
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