Resistor Color Code Calc + vs Resistor Color Code Reader

Resistor Color Code Calc reads resistor color bands both ways: pick the colors you see, or type a value and see the bands. It checks the reading from both ends of the part, shows which E-series the value belongs to, and reads SMD, capacitor and inductor codes too. ▶ COLORS TO VALUE AND BACK Choose 3, 4, 5 or 6 bands and tap each band to set its color. Every color chip shows its name and what it means in that position (digit, multiplier, tolerance or temperature coefficient), so you do not have to tell shades apart by eye alone. Type a value such as 4.7k, 4k7, 4,7 kΩ, 1M2 or 0R22 and the bands are drawn for you. If the value needs more digits than the chosen band count can show (4.99k on 4 bands), the app says so and offers 5 bands or the closest value with its deviation, instead of rounding silently. ▶ READ CHECK FROM BOTH ENDS Gold, silver and pink cannot be a first digit, black has no tolerance, white has no temperature coefficient. The app checks every band against these position rules from the left and from the right: • only one direction is valid: you get that reading, and Flip turns the bands to match • both directions are valid: both readings are shown side by side, because the colors alone cannot say which end is band 1 • neither direction is valid: the band that breaks the rule is named Gold and silver work as multipliers in the 4th position of 5-band resistors (10 Ω, 1 Ω), and the pink ×0.001 multiplier is supported. ▶ FULL RESULT Value, tolerance range (min – max), temperature coefficient for 6 bands, the working (47 × 10² Ω), the value in plain ohms and RKM code (4K7), and the E-series it belongs to: E3, E6, E12, E24, E48, E96 and E192. If the value is not in the series that fits its tolerance, the nearest values on each side are listed with their deviation. ▶ SMD, CAPACITOR AND INDUCTOR CODES • SMD resistors: 3-digit (472), 4-digit (1002), R notation (4R7, R047) and EIA-96 (01C, 68X) • Capacitors: 3-digit pF codes (104 = 100 nF), last digit 8 or 9 (229 = 2.2 pF), letter as decimal point (4n7, p47) and tolerance letters (J, K, M, Z; B, C and D in pF for small values) • Inductors: 3-digit µH codes (101 = 100 µH) and R/N notation (4R7, 47N) When a code fits more than one marking system, every reading is listed. ▶ BENCH TOOLS • Two values: the closest single standard values and the closest series and parallel pairs from E12, E24 or E96 for the value you need • Voltage divider: R1 and R2 pairs for the output you want • LED resistor: the calculated value, the next E24 value up and the current it gives • Ohm's law: any two of voltage, current, resistance and power Power ratings are suggested with a 2× margin, marked as a rule of thumb. ▶ SAVED Tap Save to keep a reading, a code or a tool result, and reopen a saved band set later. Results saved by the previous version stay in the list. The color code follows IEC 60062 and the series values follow IEC 60063. Printed colors vary between makers and lighting, so confirm critical parts with a multimeter. Works offline, no account. Supported by ads: an ad may appear when you open the app, a banner is shown at the bottom, and a full-screen ad may follow a successful Save. Sharing a result as text can be unlocked for 24 hours by watching an ad.

Read any resistor in seconds. Tap the bands as you see them on the component and the value appears instantly, with its tolerance and the range the part is actually guaranteed to fall in. Type a value instead and the app shows you which bands print it. FOUR, FIVE AND SIX BANDS A 4-band resistor carries two significant digits and a 5-band carries three, so the same colours mean different things on different parts. Most apps quietly assume one format. This one asks, and switching between them keeps the value you already have. GOLD AND SILVER ARE MULTIPLIERS TOO Not just tolerances. Without them every sub-ohm resistor is unreadable, and a surprising number of calculators cannot read one. THE BENCH TOOLS Unlock surface-mount decoding for 3-digit, 4-digit, R-notation and EIA-96 markings — including the one genuinely ambiguous case, where the app names both readings instead of guessing. Snap any value to the nearest E6, E12, E24, E48 or E96 preferred value and see how far off it is. Add up a handful of resistors in series and in parallel. WRITTEN THE WAY YOU WRITE IT Type 4k7, 4.7k, 4700, 470R or R47 — all of them parse, along with a comma decimal mark and Arabic and Persian numerals. NO ACCOUNT. NO INTERNET NEEDED. NO TRACKING. Everything is calculated on your phone. Nothing is uploaded anywhere, and the app makes no network requests at all.