Worthley 1987 calculated serum osmolality
Worthley 1987 calculated serum osmolality: 2×Na + glucose/18 + BUN/2.8. Optional osmolar gap when a measured osm is supplied. Deterministic published arithmetic with citation; not a measured freezing-point osmometer or a diagnosis.
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262 msmedian answer time
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$0.007price it asked us
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Endpoint
POST https://api.magentlab.com/api/calc/serum_osmolality
| Category | Everything else |
|---|---|
| Provider host | api.magentlab.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 0 from 0 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-28 | valid payment request | 402 | $0.007 | 262 ms |
Example input (from the provider)
{
"body": {
"items": [
{
"bun_mg_dl": 14,
"glucose_mg_dl": 90,
"glucose_mmol_l": 5,
"measured_osm_mosm_kg": 305,
"sodium_mmol_l": 140
},
{
"bun_mg_dl": 14,
"glucose_mg_dl": 90,
"glucose_mmol_l": 5,
"measured_osm_mosm_kg": 305,
"sodium_mmol_l": 140
}
]
},
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"items": {
"items": {
"properties": {
"bun_mg_dl": {
"description": "Blood urea nitrogen in mg/dL (1-200).",
"type": "number"
},
"glucose_mg_dl": {
"description": "Plasma glucose in mg/dL (50-1000). Provide this or glucose_mmol_l.",
"type": "number"
},
"glucose_mmol_l": {
"description": "Plasma glucose in mmol/L (2.8-55.5). Converted as mg/dL = mmol/L * 18.015.",
"type": "number"
},
"measured_osm_mosm_kg": {
"description": "Measured serum osmolality in mOsm/kg (200-400). When supplied, osm_gap_mosm_kg is returned.",
"type": "number"
},
"sodium_mmol_l": {
"description": "Serum sodium in mmol/L (110-160).",
"type": "number"
}
},
"required": [
"sodium_mmol_l",
"bun_mg_dl"
],
"type": "object"
},
"maxItems": 25,
"minItems": 1,
"type": "array"
}
},
"required": [
"items"
],
"type": "object"
},
"headers": {
"additionalProperties": {
"type": "string"
},
"type": "object"
},
"method": {
"const": "POST",
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}