Pocket Calculator
ElectronicsCarbon Cost Index Score
Per kg
Methodology v1.0 · Last reviewed 2026-04-08
Scope Breakdown
| Scope | kgCO₂e | % of Total | Distribution |
|---|---|---|---|
| Scope 1 | 0.4 | 5% | |
| Scope 2 | 0.8 | 10% | |
| Scope 3 | 6.8 | 85% | |
| Total | 8 | 100% |
Emission Hotspots
| Emission Hotspot | Scope | Est. % of Total |
|---|---|---|
| semiconductor and circuit board manufacturing | S3 | 35% |
| plastic housing production | S3 | 25% |
| LCD display manufacturing | S3 | 20% |
| battery production and transportation | S3 | 15% |
| assembly and packaging | S1 | 5% |
Manufacturing Geography
- Region
- China
- Grid Intensity
- 555 gCO2e/kWh (China National Grid, 2023)
Material Composition Assumptions
The typical pocket calculator weighs approximately 100 grams and consists of several key components. The ABS plastic housing represents the largest mass fraction at roughly 45 grams or 45% of total weight. The LCD display panel contributes approximately 15 grams or 15% of the device mass. The silicon circuit board accounts for about 12 grams or 12% of the total weight. Battery systems, whether zinc-carbon or alkaline chemistry, typically weigh 20 grams and represent 20% of the unit mass. The rubber keypad adds approximately 6 grams or 6% to the overall weight. Metal fasteners and small hardware components make up the remaining 2 grams or 2% of the calculator’s mass.
Manufacturing Geography
Most pocket calculators are manufactured in China, where the electronics supply chain infrastructure supports high-volume production of consumer devices. Chinese manufacturing facilities benefit from established semiconductor fabrication capabilities, plastic molding operations, and assembly networks. The national grid intensity of 555 gCO2e per kilowatt-hour reflects the coal-heavy electricity generation that powers these manufacturing processes. This grid composition significantly influences the carbon footprint of energy-intensive production steps like semiconductor processing and plastic polymer synthesis.
Regional Variation
| Manufacturing Region | Grid Intensity | Estimated CCI Score | Adjustment vs Default |
|---|---|---|---|
| China | 555 gCO2e/kWh | 8.0 | Baseline |
| Malaysia | 650 gCO2e/kWh | 9.2 | +15% |
| Japan | 330 gCO2e/kWh | 6.5 | -19% |
| Germany | 310 gCO2e/kWh | 6.2 | -23% |
| Costa Rica | 45 gCO2e/kWh | 4.8 | -40% |
Provenance Override Guidance
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Submit detailed material composition data including exact weights and polymer types for plastic housing components and specific semiconductor specifications for the circuit board.
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Provide manufacturing facility location with documented electricity sources, including any renewable energy procurement agreements or on-site generation capacity.
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Supply component-specific supplier information for LCD displays, batteries, and circuit boards, including their respective manufacturing locations and processes.
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Document end-of-life management programs or take-back initiatives that enable component recovery and recycling rather than disposal.
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Provide transportation data covering shipping methods and distances from component suppliers to final assembly facilities and distribution centers.
Methodology Notes
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The CCI score represents cradle-to-gate emissions from material extraction through manufacturing and packaging, excluding use-phase and end-of-life impacts.
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Scope 3 emissions dominate the carbon footprint due to energy-intensive upstream processes for semiconductor fabrication, plastic production, and battery manufacturing.
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The functional unit is one complete pocket calculator device capable of basic arithmetic operations over an assumed service lifetime.
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End-of-life recycling benefits are excluded due to low actual recovery rates for small consumer electronics despite technical recyclability.
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Limited lifecycle assessment data exists for basic calculators, requiring modeling based on component-level emissions factors and similar small electronic devices.