Developer Utilities

Small developer utilities that save a trip to a random website. Encode and decode Base64, explain a regex, build UTM links, generate QR codes and vCards, and more — the everyday helpers. Free in your browser, and available by API when you need them in a script.

Developer Utilities
Swiss cheese coronavirus
stacked layer residual transmission
POST /health/swiss-cheese-coronavirus$0.002
Developer Utilities
T/E2 ratio calculator
testosterone to estradiol from serum
POST /health/t-e2-ratio$0.002
Developer Utilities
Tidal volume calculator
mL from sex and height via PBW
POST /health/tidal-volume$0.002
Developer Utilities
Time of death calculator
hours since death from body cooling
POST /health/time-of-death$0.002
Developer Utilities
TIMI STEMI risk score
points and 30-day mortality, free
POST /health/timi-stemi$0.002
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TIMI UA/NSTEMI calculator
7-criterion risk score and category
POST /health/timi-ua-nstemi$0.002
Developer Utilities
Tinetti fall risk calculator
POMA score 0–28 and category
POST /health/tinetti$0.002
Developer Utilities
ACR TI-RADS calculator
thyroid nodule points and TR category
POST /health/tirads$0.002
Developer Utilities
tPA dose calculator
alteplase 0.9 mg/kg total and bolus
POST /health/tpa$0.002
Developer Utilities
Tramadol dosage calculator
mg and interval from weight
POST /health/tramadol-dosage$0.002
Developer Utilities
Transferrin saturation calculator
serum iron / TIBC, free
POST /health/transferrin$0.002
Developer Utilities
TTKG calculator
transtubular potassium gradient from urine and serum
POST /health/ttkg$0.002
Developer Utilities
Twin pregnancy weight gain calculator
BMI and weeks, free
POST /health/twin-pregnancy-weight-gain$0.002
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Twin pregnancy probability
age, parity, family history of twins
POST /health/twinning$0.002
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Tylenol dosage calculator
pediatric acetaminophen mg/kg
POST /health/tylenol-dosage$0.002
Developer Utilities
Tylenol overdose calculator
acetaminophen toxicity from dose
POST /health/tylenol-overdose$0.002
Developer Utilities
Urine anion gap calculator
Na + K − Cl in mEq/L, free
POST /health/urine-anion-gap$0.002
Developer Utilities
Urine output calculator
mL/kg/hr from volume, weight and hours
POST /health/urine-output$0.002
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Urine pregnancy test interpreter
hCG mIU/mL to result
POST /health/urine-pregnancy-test$0.002
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URR calculator
urea reduction ratio from pre and post BUN
POST /health/urr$0.002
Developer Utilities
US vaccine strategy
CDC priority phase from age, job, conditions
POST /health/us-vaccine-strategy$0.002
Developer Utilities
Vaccine efficacy calculator
VE% from vaccinated vs placebo
POST /health/vaccine-efficacy$0.002
Developer Utilities
Vaccine immunity calculator
remaining protection percentage
POST /health/vaccine-immunity$0.002
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Vaccine production time calculator
days from doses and capacity
POST /health/vaccine-production$0.002
Developer Utilities
Australian COVID vaccine queue
phase and position
POST /health/vaccine-queue-australia$0.002
Developer Utilities
Canada COVID vaccine queue - priority phase calculator
POST /health/vaccine-queue-ca$0.002
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England vaccine queue
JCVI band, position, and estimated date
POST /health/vaccine-queue-england$0.002
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Indian COVID vaccine queue
priority group and wait
POST /health/vaccine-queue-india$0.002
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Malaysia COVID vaccine queue - priority phase calculator
POST /health/vaccine-queue-malaysia$0.002
Developer Utilities
Netherlands vaccine queue
Dutch priority group from age and risk
POST /health/vaccine-queue-netherlands$0.002
Developer Utilities
Northern Ireland COVID vaccine queue
JCVI priority band
POST /health/vaccine-queue-northern-ireland$0.002
Developer Utilities
Philippines COVID vaccine queue - priority group calculator
POST /health/vaccine-queue-philippines$0.002
Developer Utilities
South Africa vaccine queue
NDoH phase from age, job, comorbidities
POST /health/vaccine-queue-sa$0.002
Developer Utilities
Scottish COVID vaccine queue
JCVI priority group
POST /health/vaccine-queue-scotland$0.002
Developer Utilities
UK COVID vaccine queue - JCVI priority cohort calculator
POST /health/vaccine-queue-uk$0.002
Developer Utilities
Wales vaccine queue
Welsh priority group from age, job, CEV
POST /health/vaccine-queue-wales$0.002
Developer Utilities
VBAC success calculator
vaginal birth after cesarean probability
POST /health/vbac-risk-score$0.002
Developer Utilities
Venous blood pH calculator
acidemia, normal or alkalemia
POST /health/venous-blood-ph$0.002
Developer Utilities
SIR epidemic calculator
daily S, I, R from infection rates
POST /health/viral-infection-sir$0.002
Developer Utilities
Vital capacity calculator
predicted VC from height, age and sex
POST /health/vital-capacity$0.002
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Vitamin daily intake calculator
RDA from age, sex, pregnancy
POST /health/vitamin$0.002
Developer Utilities
Vitamin A intake calculator
recommended mcg RAE by age and sex
POST /health/vitamin-a$0.002
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Vitamin D calculator
daily IU from 25(OH)D and weight
POST /health/vitamin-d$0.002
Developer Utilities
VLDL cholesterol calculator
fasting triglycerides ÷ 5 in mg/dL
POST /health/vldl$0.002
Developer Utilities
VTE risk in pregnancy calculator
score and anticoagulation
POST /health/vte-risk-pregnancy$0.002
Developer Utilities
Wake-up calculator
optimal times from bedtime by 90-min cycles
POST /health/wake-up$0.002
Developer Utilities
Warfarin dosing calculator
weekly mg from age and genotype
POST /health/warfarin-dosing$0.002
Developer Utilities
Warsaw method calculator
mealtime insulin from carbs and FPU
POST /health/warsaw-method$0.002
Developer Utilities
Free water deficit calculator
liters from Na, weight, and sex
POST /health/water-deficit$0.002
Developer Utilities
Weight gain calculator
IOM pregnancy range by BMI and week
POST /health/weight-gain$0.002
Developer Utilities
Weight Watchers points calculator
SmartPoints from nutrition facts
POST /health/weight-watchers-points$0.002
Developer Utilities
Weight week by week
expected pregnancy kg by BMI category
POST /health/weight-week-by-week$0.002
Developer Utilities
Wells PE score calculator
pulmonary embolism likelihood
POST /health/wells-pe$0.002
Developer Utilities
Air conditioner room size
BTU/h from area, height, sun
POST /build/air-conditioner-room-size$0.002
Developer Utilities
Aluminum weight calculator
kg from dimensions and density
POST /build/aluminum-weight$0.002
Developer Utilities
Miter saw angle calculator
blade and miter from corner
POST /build/angle-cut$0.002
Developer Utilities
Circular arch calculator
rise, arc length and chord from span
POST /build/arch$0.002
Developer Utilities
Asphalt calculator
paving tonnage from length, width, depth, density
POST /build/asphalt$0.002
Developer Utilities
Birdsmouth cut calculator
seat length and cut depth, free
POST /build/birdsmouth-cut$0.002
Developer Utilities
Beam load calculator
simply supported max moment and shear
POST /build/beam-load$0.002