Calculate component values for desired corner frequency, resistance, capacitance, or inductance. Find combinations of resistors, capacitors, and inductors. View detailed calculations and formulas. Export results. Remove ads with PRO version.
by Siu Yuen Ho★ 4.865 ratingsUtilitiesFreeData updated 2026-09-12
Calculate loads, voltage drops, and conductor sizes according to NEC codes. Verify compliance for residential and commercial projects. Access code references for 2002–2023 editions. Perform wire sizing, panel scheduling, and circuit calculations.
Convert units and currencies by typing queries in a single input field. Supports over 900 units and 170 currencies. Dynamically recognizes abbreviations and symbols. Search for conversions similar to web searches.
Convert units across 20 categories with over 400 options, including mixed units like feet and inches. Add widgets for quick access. View conversion history and share results.
Perform calculations with a standard , convert currencies, calculate tips, and compute taxes. Input numbers and operators to get results. Share calculations via email.
Search shapes by standards including European, British, American (AISC), and Canadian (CISC). View geometrical properties and full descriptions for each shape. Filter and locate shapes using multiple search criteria.
Determine resistor values by selecting ring colors and number of rings. Choose orientation with the larger gap on the right. Receive value, tolerance, and other details.
A and unit/currency with a clean interface. Convert between 500 units across 29 categories and 161 currencies. Customize colors and display selected units. Enter values to instantly convert between units.
Calculate bends for offsets, rolling offsets, parallel adjustments, and saddles using English or metric measurements. Specify bend directions and angles. ccurate bend diagrams and measurements to reduce material waste and installation time.
Convert units across 17 categories with 398 options. Switch between currencies using daily updated exchange rates. Access converter on Apple Watch for quick and conversions.
Perform basic and advanced calculations including addition, subtraction, multiplication, division, and exponents. Convert units between degrees, radians, and grads. Switch between standard and scientific modes.
Convert units across 19 categories including acceleration, angle, area, cooking, data storage, density, and energy. Switch between 150+ currencies. Perform calculations for conversions and exchanges. Share results via copy or email.
Calculate earnings for hourly, daily, weekly, bi-weekly, semi-monthly, quarterly, and yearly periods. Input fixed income and estimated working time to receive accurate results. Track progress over time and adjust inputs for updated calculations.
Resistance values by entering SMD codes or color combinations. Convert values instantly. Display results in ohms, kilohms, and megohms. Automatically calculate tolerance and percentage deviation. Export data as text or share via email.