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# Electronics API

4 endpoints — Same auth, same credit pool, same JSON envelope. Use them directly from apps, content sites, workflows, or agents without rebuilding formulas, validation, and docs for each tool.
[Start free →](/billing/checkout/?plan=free) [View OpenAPI](/v1/docs) [All categories](/tools/)
Circuits
[
Transformer Calculator transformer-calculator
Calculate transformer turns ratio, secondary voltage, current, power, and impedance ratio.
1cr · v2026-04-22
](/tools/transformer-calculator/) [
Voltage Divider Calculator voltage-divider-calculator
Calculate voltage divider output or solve for R1 or R2.
1cr · v2026-04-22
](/tools/voltage-divider-calculator/)
Runtime
[
Battery Life Calculator battery-life-calculator
Estimate battery runtime from capacity, consumption, and efficiency.
1cr · v2026-04-22
](/tools/battery-life-calculator/)
Wiring
[
Voltage Drop Calculator voltage-drop-calculator
Calculate electrical voltage drop for AWG copper or aluminum wire runs.
1cr · v2026-04-22
](/tools/voltage-drop-calculator/)
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