Resin Exposure Time Calculator

Layer and bottom exposure plus Jacob's-curve cure depth from resin critical energy, penetration depth, printer LED power and layer height. Flags under-cure (delamination) and over-cure (brittle, blooming).

DomainResin PrintingStandardJacobs working-curveVersionv1.0.0Added2026-05-19

Inputs

Critical Energy (Ec)mJ/cm²

From the resin spec or a working-curve test. Siraya Blu ~5, Anycubic Standard ~8, ABS-Like ~15, dental/castable 25+.

Penetration Depth (Dp)µm

Jacob's-curve slope. Standard 405 nm resins sit at 150-250 µm; opaque/loaded resins lower.

Printer LED PowermW/cm²

Mars 3 Pro 3.4, Saturn 3 5.0, Mono M5s 4.5, Sonic Mini 8K S 4.0. Measure with a UV meter for accuracy.

Layer Heightµm

Target Over-Cure Depthµm

Extra cure into the previous layer for adhesion. 20-50 µm is typical.

Bottom Multiplier×

Multiplier for bottom-layer exposure. 6-10× is the safe range.

Bottom Layer Count

Result

version1.0.0standardJacobs working-curve

POST /v1/resin-printing/exposure-time-calculatorView API docs →

curl -X POST https://toolsamurai.com/api/v1/resin-printing/exposure-time-calculator \
  -H "Authorization: Bearer sk_live_•••••••••••••••" \
  -H "Content-Type: application/json" \
  -d '{
     "resin_cure_energy_mj_cm2": 8,
     "resin_penetration_depth_um": 200,
     "printer_led_power_mw_cm2": 4.5,
     "layer_height_um": 50,
     "overcure_target_um": 30,
     "bottom_exposure_multiplier": 8,
     "bottom_layer_count": 6
  }'

resinexposuremslaledcure-depthjacobs-curve