All Calculators
Every Standard Clarity tool in one place - each tied to the IPC, IEC, UL, NEMA or NEC clause it comes from.
Find the calculation by engineering task
Use the discipline groups below rather than choosing a formula by name alone. Start with the design decision you need to make, then check the result against the cited standard edition and the assumptions shown by the tool.
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Size traces, vias and impedance
Use current, copper thickness, temperature rise and stack-up geometry to choose a starting layout.
EnclosuresChoose ingress and safety protection
Decode IP and NEMA ratings, insulation spacing and UL 94 material classifications.
ConversionsConvert engineering units and markings
Handle AWG, battery energy and capacitor codes with the formula and assumptions visible.
Browse all calculators by discipline
PCB design
Size copper, estimate resistance and check controlled-impedance geometry.
PCB Trace Width Calculator
IPC-2221Size a copper trace by the IPC-2221 constant-current method, for external and internal layers at the same time.…
PCB Trace Resistance Calculator
IPC-2221CFind the DC resistance, voltage drop and power loss of a copper PCB trace from its width, copper…
PCB Via Current Calculator
IPC-2221Size a plated through-hole via, or a via array, for the current it must carry between layers -…
PCB Impedance Calculator
IPC-2141AFind the characteristic impedance of a microstrip, stripline or grounded coplanar (CPWG) trace, the differential impedance of an…
Enclosure protection and electrical safety
Decode ingress ratings, select enclosure types, size insulation spacing and screen material flammability.
IP & NEMA Rating Decoder
IEC 60529 / NEMA 250Decode any IP code or NEMA enclosure type in plain language, and cross-reference between the two rating systems.
NEMA Enclosure Type Selector
ANSI/NEMA EN 10250-2024Describe the environment and get the NEMA 250 enclosure type that matches it - with the reasoning, the…
Pollution Degree 1-4 Selector
IEC 60664-1Choose the conditions that can reach the insulating surface. The result updates as you go and gives you…
Creepage & Clearance Calculator
IEC 60664-1Work out the minimum clearance and creepage distance for an insulation barrier - from working voltage, pollution degree,…
UL 94 Flammability Rating Selector
UL 94 / IEC 60695-11Check whether a UL 94 rating meets the class you need, and find the rating a plastic part…
Electrical conversions and component references
Convert wire, battery-energy and capacitor markings without hiding the underlying relationship.
AWG to mm² Converter
ASTM B258Convert American Wire Gauge to diameter and cross-section and back, with copper resistance and the standard behind every…
mAh to Wh Calculator
Energy = charge x voltageConvert milliamp-hours (mAh) to watt-hours (Wh), or reverse Wh to mAh, using the battery's nominal voltage. The calculator…
Capacitor Code Calculator
IEC 60062Decode the markings on a ceramic, film or SMD capacitor into picofarads, nanofarads and microfarads - and convert…