Calculation Tools

Percentage CalculatorCalculate a percentage of a number and the remaining amount. Percentage Change CalculatorFind the increase or decrease between an old and a new value. Arithmetic Mean CalculatorCalculate the sum and arithmetic mean of up to five numbers.

Ohm’s Law CalculatorCalculate current and electrical power from voltage and resistance. Electrical Power and Energy CalculatorCalculate power and energy consumption from voltage, current and operating time. Microstrip Impedanceasdsad Bandwidth & Maximum Trace LengthEstimate bandwidth and the transmission-line length threshold from rise time. Stripline ImpedanceCalculate impedance of a symmetric stripline between two reference planes. Asymmetric & Dual StriplineEstimate impedance for an asymmetric stripline with unequal distances to its two planes. Embedded Microstrip ImpedanceEstimate impedance of a surface trace embedded under a dielectric coating. Grounded Coplanar WaveguideEstimate grounded coplanar waveguide impedance from trace width and side gap. Differential Pair ImpedanceCalculate single-ended and differential impedance for microstrip or stripline pairs. Broadside Differential PairEstimate differential impedance for two vertically coupled traces on adjacent layers. PCB Near-End CrosstalkEstimate NEXT coupling and saturation length between parallel traces. PCB Trace Current CapacityEstimate trace current from cross-section and allowed temperature rise using the IPC-2221 equation. PCB Trace Resistance & Skin DepthCalculate copper trace DC resistance, voltage drop, power loss and skin depth. PCB Via Electrical PropertiesEstimate resistance, inductance, capacitance, impedance and resonance for a plated via. PCB Via Current EstimateEstimate via current from plating cross-section and temperature rise. Differential Via Stub LengthEstimate maximum stub length from baud rate and dielectric constant. Through-Hole PadstackCalculate pad and thermal-clearance dimensions from hole, annular ring and isolation. Rectangular Pin Drill SizeCalculate a rectangular pin diagonal and starting drill diameters with manufacturing allowance. BGA Land SizeCreate a starting land diameter and tolerance range from BGA ball diameter. Trace Between PadsCalculate available width for one or two traces routed between pads or BGA lands. Minimum PCB Conductor SpacingGet a preliminary minimum-clearance estimate from voltage and environment class. PDN Target ImpedanceCalculate target PDN impedance from rail voltage, allowed ripple and transient current. PCB Plane CapacitanceCalculate capacitance and capacitive reactance between two copper planes. Planar PCB InductorCalculate inductance of square, hexagonal, octagonal or circular planar PCB coils. Embedded PCB ResistorCalculate an embedded resistor from sheet resistance and geometry. Effective Dielectric ConstantFind effective dielectric constant and propagation velocity from microstrip geometry. PCB Trace Fusing CurrentEstimate copper trace fusing current for a duration using Onderdonk’s equation. Junction Temperature & Heat SinkCalculate junction temperature or required heat-sink resistance from power and thermal resistances. Crystal Load CapacitorsFind a symmetric C1/C2 starting value from crystal load and stray capacitance. Crystal PPM & Frequency DeviationCalculate frequency range from center frequency and PPM tolerance. PCB WavelengthCalculate wavelength on a PCB from frequency and effective dielectric constant. XC, XL & ResonanceCalculate reactances and resonant frequency from frequency, capacitance and inductance. LED Series ResistorCalculate LED series resistance and power from supply, LED drop and target current. Series/Parallel RLC CombinationCalculate the series or parallel equivalent of two components. RF Pi & T AttenuatorCalculate resistor values for a passive Pi or T attenuator with equal port impedances. AWG Wire Diameter & ResistanceCalculate copper wire diameter, area and resistance per metre from AWG number. Electronics ConversionsPerform dB, dBm, rectangular-polar, angle, temperature and millimetre-mil conversions.

Pressure CalculatorCalculate pressure in pascals and kilopascals from force and area. Density CalculatorCalculate density from mass and volume. Kinetic Energy CalculatorCalculate kinetic energy in joules from mass and velocity.

Date Difference CalculatorCalculate calendar days and approximate weeks between two dates. Fuel Consumption CalculatorCalculate consumption per 100 km and cost from distance, fuel used and price. Length Unit ConverterConvert between millimetres, centimetres, metres, kilometres, inches and feet.