| What it does | Free metric weight converter for milligrams, grams and micrograms
| Weekly propane and heating oil prices by state with free home heating cost calculators
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| Pricing model | Free
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| Pricing | Not given
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| Key features | - Live results as you type with no submit button or page reload
- Exact decimal arithmetic with no rounding drift
- Converts in both directions: milligrams to grams and grams to milligrams
- Includes micrograms as a first-class unit in the full mcg to mg to g chain
- Privacy by design with calculations running entirely in browser
- Results display up to ten decimal places with at least four significant digits for small values
- Copy button to place full equation on clipboard
- Common values quick-access chips for frequent conversions
| - Weekly EIA residential propane prices for 38 states
- Regional and state price trends
- Tank fill cost estimates for common tank sizes
- Year-over-year price comparison
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| What makes it different | - Exact results using SI definitions with no approximation or rounding error
- Entirely free with no account, paywall, usage limit or installation required
- Nothing sent to servers: all calculations run in your browser for complete privacy
- Educational guides explaining practical contexts where these units matter
| - Built from public government data with every price dated and linked to its source
- No sign-up required, everything is free
- Independent tool not affiliated with fuel dealers or utilities
- Calculators use actual government prices and normal weather for accurate estimates
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 1 ● no change since last check | 1 ▲ +1 (up) since last check |
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| Trust Flow (Majestic) | 17 | 0 |
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| Citation Flow (Majestic) | 30 | 0 |
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| Referring domains (Majestic) | 431 | 0 |
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Milligrams to Grams