PPMからPPBへ
Parts Per Million (PPM) の値を入力すると、瞬時に正確な Parts Per Billion (PPB) への変換が行われます。
PPM から PPB への仕組み
PPM を PPB に変換するには、PPM の値を確認し、1,000 を掛け、PPB の結果を読み取るという 3 つのステップを適用します。
PPM の値を確認する
Parts Per Million で濃度値を記録します。PPM は、溶液 1,000,000 (10⁶) 部に対する溶質 1 部を表し、希薄水溶液の場合は 1 mg/L、固体サンプルの場合は 1 mg/kg に相当します。
1,000 を掛ける
1,000 (10³) の変換係数を適用します。この係数が存在するのは、10億が100万の正確に1,000倍大きいからです。この乗算により、より粗い PPM 単位がより細かい PPB 単位に変換されます。
PPB の結果を読み取る
結果は Parts Per Billion で表された濃度です。PPB は PPM の 1,000 倍の細かい分解能を提供し、水溶液の場合は 1 µg/L、固体サンプルの場合は 1 µg/kg に相当します。
PPM から PPB への変換表
一般的な Parts Per Million の値とそれに対する正確な Parts Per Billion に相当する値をすばやく確認できる参照変換表です。
| PPM (mg/L) | PPB (µg/L) | PPT (ng/L) | mg/L 相当 | µg/L 相当 | パーセンテージ (%) |
|---|---|---|---|---|---|
| 0.001 | 1 | 1,000 | 0.001 mg/L | 1 µg/L | 0.0000001% |
| 0.005 | 5 | 5,000 | 0.005 mg/L | 5 µg/L | 0.0000005% |
| 0.01 | 10 | 10,000 | 0.01 mg/L | 10 µg/L | 0.000001% |
| 0.015 | 15 (EPA Lead) | 15,000 | 0.015 mg/L | 15 µg/L | 0.0000015% |
| 0.05 | 50 | 50,000 | 0.05 mg/L | 50 µg/L | 0.000005% |
| 0.1 | 100 | 100,000 | 0.1 mg/L | 100 µg/L | 0.00001% |
| 0.5 | 500 | 500,000 | 0.5 mg/L | 500 µg/L | 0.00005% |
| 1 | 1,000 | 1,000,000 | 1 mg/L | 1,000 µg/L | 0.0001% |
| 2 | 2,000 | 2,000,000 | 2 mg/L | 2,000 µg/L | 0.0002% |
| 5 | 5,000 | 5,000,000 | 5 mg/L | 5,000 µg/L | 0.0005% |
| 10 | 10,000 | 10,000,000 | 10 mg/L | 10,000 µg/L | 0.001% |
| 50 | 50,000 | 50,000,000 | 50 mg/L | 50,000 µg/L | 0.005% |
| 100 | 100,000 | 100,000,000 | 100 mg/L | 100,000 µg/L | 0.01% |
| 500 | 500,000 | 500,000,000 | 500 mg/L | 500,000 µg/L | 0.05% |
| 1,000 | 1,000,000 | 1,000,000,000 | 1,000 mg/L | 1,000,000 µg/L | 0.1% |
Specialized Calculators
22 targeted conversion tools, organized by category — concentration, water quality, and air & gas conversions.
Concentration Converters
PPM to PPB Dilution Calculator
Calculate final PPB concentration after diluting a PPM solution using C₁V₁ = C₂V₂.
Wt PPM to PPB Calculator
Convert weight-based PPM (mg/kg) to PPB (µg/kg) for solid and semi-solid samples.
PPM to PPBV Calculator
Convert PPMV to PPBV for gas-phase and atmospheric concentration measurements.
PPB to PPM Hanna Calculator
Convert Hanna instrument PPB readings to PPM by dividing by 1,000.
PPM vs PPB Calculator
Bidirectional converter — enter either PPM or PPB and instantly see the other value.
PPM to PPB to PPT Calculator
Chain conversion — enter PPM to get both PPB and PPT (Parts Per Trillion) at once.
PPM to mg/kg & mg/L Calculator
Convert PPM to milligrams per kilogram and milligrams per liter with optional density input.
PPT to PPM Converter
Convert Parts Per Trillion to Parts Per Million by dividing by 1,000,000.
PPM to Percent Converter
Convert PPM to percentage (%) by dividing by 10,000 — ideal for solutions and pool chemistry.
Percent to PPM Converter
Convert percentage (%) to PPM by multiplying by 10,000.
mg/L to PPM Converter
Convert milligrams per liter back to PPM with optional density input.
PPB to μg/L Converter
Convert PPB to micrograms per liter for drinking water and heavy metal testing.
μg/L to PPB Converter
Convert micrograms per liter to PPB with optional density input.
Water Quality & Solution Tools
TDS to EC Converter
Convert Total Dissolved Solids (ppm) to Electrical Conductivity (µS/cm).
EC to TDS Converter
Convert Electrical Conductivity (µS/cm) to TDS (ppm) with adjustable conversion factor.
Water Hardness Converter
Convert water hardness from grains per gallon (GPG) to ppm as CaCO₃.
Salinity Converter
Convert salinity from parts per thousand (ppt) to ppm.
Molarity to PPM Calculator
Convert molar concentration (mol/L) to PPM using molar mass.
Air Quality & Gas Converters
mg/m³ to PPM Converter
Convert milligrams per cubic meter to PPM for gases using molecular weight.
PPM to mg/m³ Converter
Convert PPM to milligrams per cubic meter for air quality monitoring.
μg/m³ to PPB Converter
Convert micrograms per cubic meter to PPB for air pollutant reporting.
PPB to μg/m³ Converter
Convert PPB to micrograms per cubic meter using molecular weight.
よくある質問
PPM から PPB の計算、化学の定義、および基準に関する一般的な質問。