Free Tools
Interactive calculators built for bonsai for beginners — choosing a first tree, watering, pruning, wiring, repotting, styling, and seasonal care. No sign-up, no downloads — enter your numbers and get an answer you can act on.
Bonsai Pot Size Calculator
Get a starting pot length, depth, and width from your tree's height and trunk diameter, using classical display proportions.
Bonsai Wire Size Calculator
Find the right aluminum wire gauge for a branch or trunk based on its diameter, so you get enough hold without overdoing it.
Bonsai Soil Mix Calculator
Work out akadama, pumice, and lava rock amounts for conifer, deciduous, or tropical soil ratios, plus a pot volume estimate.