# SMD Chip Package Size Chart: Imperial and Metric Codes > Source: https://netray.co/tools/smd-chip-package-size-imperial-metric-reference > Publisher: Netray (netray.co), AI and integration engineering for ERP and manufacturing systems. > Section: Free Tools ## Short answer Convert between imperial and metric chip size codes (0402, 0603, 1005, 1608) with length and width in mm. ## Category electronics ## Industry Electronics Manufacturing ## Audience - PCB designer - Component engineer - SMT programmer ## Tool **Kind:** worksheet **Mode:** reference **Columns:** #### Imperial code **Key:** imperial **Type:** text #### Metric code **Key:** metric **Type:** text #### Nominal length (mm) **Key:** length_mm **Type:** number **Format:** decimal #### Nominal width (mm) **Key:** width_mm **Type:** number **Format:** decimal #### Nominal length (in) **Key:** length_in **Type:** number **Format:** decimal #### Nominal width (in) **Key:** width_in **Type:** number **Format:** decimal #### Typical resistor power **Key:** power **Type:** text #### Note **Key:** note **Type:** text **Rows:** **Imperial:** 01005 **Metric:** 0402 **Length mm:** 0.4 **Width mm:** 0.2 **Length in:** 0.016 **Width in:** 0.008 **Power:** 1/32 W **Note:** Very small, needs tight process control **Imperial:** 0201 **Metric:** 0603 **Length mm:** 0.6 **Width mm:** 0.3 **Length in:** 0.024 **Width in:** 0.012 **Power:** 1/20 W **Note:** Common in dense mobile designs **Imperial:** 0402 **Metric:** 1005 **Length mm:** 1 **Width mm:** 0.5 **Length in:** 0.04 **Width in:** 0.02 **Power:** 1/16 W **Note:** Widely used general purpose size **Imperial:** 0603 **Metric:** 1608 **Length mm:** 1.6 **Width mm:** 0.8 **Length in:** 0.063 **Width in:** 0.031 **Power:** 1/10 W **Note:** Easy to hand rework **Imperial:** 0805 **Metric:** 2012 **Length mm:** 2 **Width mm:** 1.25 **Length in:** 0.079 **Width in:** 0.049 **Power:** 1/8 W **Note:** Common for prototypes **Imperial:** 1206 **Metric:** 3216 **Length mm:** 3.2 **Width mm:** 1.6 **Length in:** 0.126 **Width in:** 0.063 **Power:** 1/4 W **Note:** More flex crack risk for ceramics **Imperial:** 1210 **Metric:** 3225 **Length mm:** 3.2 **Width mm:** 2.5 **Length in:** 0.126 **Width in:** 0.098 **Power:** 1/2 W **Note:** Used for higher value capacitors **Imperial:** 1812 **Metric:** 4532 **Length mm:** 4.5 **Width mm:** 3.2 **Length in:** 0.177 **Width in:** 0.126 **Power:** n/a **Note:** Common for larger capacitors and inductors **Imperial:** 2010 **Metric:** 5025 **Length mm:** 5 **Width mm:** 2.5 **Length in:** 0.197 **Width in:** 0.098 **Power:** 3/4 W **Note:** Power resistors **Imperial:** 2512 **Metric:** 6432 **Length mm:** 6.3 **Width mm:** 3.2 **Length in:** 0.248 **Width in:** 0.126 **Power:** 1 W **Note:** Current sense resistors **Notes:** Dimensions are nominal values. Tolerances, thickness and power ratings differ by manufacturer and series, so always confirm against the datasheet and land pattern standard (IPC-7351) used by your CAD library. ## Content **Intro:** SMD chip sizes are written in two different codes, imperial in hundredths of an inch and metric in tenths of a millimetre. This chart lets you convert between them and see the nominal body dimensions at a glance. **Sections:** #### How to read the codes **Body:** An imperial code such as 0603 means roughly 0.06 inch by 0.03 inch. A metric code such as 1608 means 1.6 mm by 0.8 mm. The same physical part is 0603 in imperial and 1608 in metric. The exception that catches people is 0402: imperial 0402 is 1.0 by 0.5 mm, while metric 0402 is the much smaller imperial 01005. Always state which system you are using in a BOM or an email. #### Why the size matters in assembly **Body:** Package size drives nozzle choice, feeder tape width, stencil aperture design and the inspection resolution you need. Small sizes such as 01005 need very tight printing control and fine nozzles. Larger ceramic capacitors are more prone to flex cracks when boards bend during depaneling. **Bullets:** - 8 mm tape is typical for chip sizes up to 1206 - Smaller parts need smaller stencil apertures and finer fiducial alignment - Check the land pattern against IPC-7351 naming #### Worked example **Body:** A BOM from a European customer lists capacitors as 1005. The buyer's ERP uses imperial codes and has an item described as 0402. This chart confirms they are the same physical size at 1.0 by 0.5 mm, so the item can be matched without an engineering query. Record both codes in the item description to avoid future confusion. #### Common mistakes **Body:** The most common mistake is mixing the 0402 imperial and 0402 metric names. The second is assuming the power rating is fixed by size; it depends on the series and the thermal design of the board. The third is using a footprint for the wrong thickness or termination style. Keep the datasheet with the BOM line. **Cta:** If your ERP item master holds both imperial and metric descriptions, Netray can help standardise item attributes so BOM and AVL searches work. **Faq:** #### Is 0402 metric the same as 0402 imperial? **Answer:** No. Imperial 0402 is about 1.0 by 0.5 mm. Metric 0402 is about 0.4 by 0.2 mm and equals imperial 01005. Always label which system you use when ordering or writing a BOM. #### What is 0603 in mm? **Answer:** Imperial 0603 is about 1.6 by 0.8 mm, and its metric code is 1608. Metric 0603 is a different, much smaller part that equals imperial 0201 at about 0.6 by 0.3 mm. #### Does package size set the power rating? **Answer:** It sets a typical range only. Rating depends on the manufacturer series, pad design and board copper. Use the datasheet derating curve for the actual application. #### Which size is easiest to rework by hand? **Answer:** 0603 and 0805 are usually the easiest for hand soldering. 0402 is possible with a microscope and good tools. 0201 and 01005 are generally reworked with a hot air or specialised station. ## Search terms smd package size chart, 0402 size in mm, 0603 vs 1608 metric, smd resistor size chart, imperial to metric smd codes, chip component dimensions, 0805 smd dimensions, 01005 package size --- Talk to an engineer: https://netray.co/contact?intent=erp_ai | Machine catalog: https://netray.co/agent/catalog.json