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Calcimator

Mangrove Carbon Stock Calculator

Estimate mangrove ecosystem carbon stock from tree measurements, soil properties, and area using allometric equations (Komiyama et al. 2005).

Inputs

%

Results

Total C stock (Mg C/ha)

557.7

AGB carbon (Mg C/ha)77.5
BGB carbon (Mg C/ha)30.2
Soil OC (Mg C/ha)450
Total CO₂ equivalent (Mg)20,468
Est. carbon credit value ($)$307,019.00
How to Use This Calculator
  1. Enter the mangrove stand area in hectares.
  2. Input the average tree density (stems per hectare) and mean diameter at breast height (DBH) in cm.
  3. Set the forest zone (fringe, basin, riverine) to apply the correct allometric equation.
  4. Review the estimated aboveground biomass (Mg/ha), belowground biomass, and total carbon stock (Mg C).
  5. Use the carbon stock to calculate Verified Carbon Units (VCUs) for blue carbon credit projects.

How the result changes with Soil sampling depth (cm)

Soil sampling depth (cm)Total C stock (Mg C/ha)
59373.2
182926.7
3291,588.2
4512,137.2

What each input means

Mangrove area (hectares)
Total area of the mangrove stand.
Average DBH (cm)
Average diameter at breast height (1.3 m) of mangrove trees.
Tree density (trees/ha)
Number of trees per hectare. Dense mangroves: 1000-5000/ha, mature stands: 500-1500/ha.
Soil sampling depth (cm)
Depth of soil carbon assessment. Mangrove soils store carbon to 1-3 m depth.
Soil bulk density (g/cm³)
Dry soil bulk density. Mangrove soils typically 0.2-0.8 g/cm³ (organic-rich soils are lighter).
Soil organic carbon (%)
Percentage of organic carbon in soil. Mangrove soils typically 2-25%.

What each result means

Total C stock (Mg C/ha)
Total ecosystem carbon stock: above-ground + below-ground biomass + soil organic carbon per hectare.
AGB carbon (Mg C/ha)
Above-ground biomass carbon using Komiyama et al. (2005) allometric equation.
BGB carbon (Mg C/ha)
Below-ground (root) biomass carbon estimated at 39% of above-ground biomass.
Soil OC (Mg C/ha)
Soil organic carbon stock to the specified depth.
Total CO₂ equivalent (Mg)
Total CO₂ equivalent stored across the entire area (C × 3.67).
Est. carbon credit value ($)
Estimated value at $15/tonne CO₂ (voluntary carbon market mid-range).

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Mangrove area (hectares) = 10, Average DBH (cm) = 15, Tree density (trees/ha) = 1200, Soil sampling depth (cm) = 100 = 6 input(s) provided
  2. Calculate Total C stock
    Total C stock = agbCarbonMgPerHa + bgbCarbonMgPerHa + socMgPerHa
    557.7 = 557.7
  3. Calculate AGB carbon
    AGB carbon = agbMgPerHa * biomassCarbonFraction
    77.5 = 77.5
  4. Calculate BGB carbon
    BGB carbon = bgbMgPerHa * biomassCarbonFraction
    30.2 = 30.2

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