工学

無料のアメリカンワイヤーゲージ（AWG）計算機 — ワイヤーの直径、断面積、抵抗を調べる; 電流と電圧降下によってワイヤーをサイズ指定; 直径をAWGに変換; 並列ワイヤーの等価ゲージを計算。

Free American Wire Gauge (AWG) wire size reference table and calculator. Look up wire diameter, cross-sectional area, resistance, ampacity, skin depth, and breaking force for AWG 4/0 through AWG 40. Supports copper, aluminum, and 6 other materials.

無料の電気料金計算機 — 家電ごとの月間電気コストを推定し、メーター読み取りから請求書を計算し、電気料金を比較し、年間CO2排出量を追跡します。

Free Gear Ratio Calculator — compute output RPM, torque multiplication, mechanical advantage, and power for single-stage, multi-stage compound gear trains, or back-calculate the ratio from known speeds.

この無料ツールを使用するにはクリックしてください

Free Parallel Resistor Calculator — instantly find equivalent resistance for any number of resistors connected in parallel. Supports mixed units (µΩ to GΩ), missing-resistor solver, series mode, step-by-step breakdown, conductance, current distribution, and power dissipation.

Free Resistor Calculator — decode resistor color codes (3, 4, 5, and 6-band), calculate series and parallel resistance, solve voltage divider circuits, and decode SMD resistor codes. Includes a visual resistor diagram and IEC 60062 color band reference chart.

Free Resistor Color Code Chart and Calculator — decode 3-band, 4-band, 5-band, and 6-band resistors instantly. Includes reverse lookup, parallel/series calculator, SMD decoder, and full IEC 60062 reference table.

この無料ツールを使用するにはクリックしてください