Design
Convert HEX color values to LAB for color management with alpha channel support
hex-to-lab-converterDesign
Convert HSL color values to CMYK for printing with alpha channel support
hsl-to-cmyk-converterDesign
Convert HSL color values to LAB for color management with alpha channel support
hsl-to-lab-converterNetwork
Convert integers to IPv4 addresses. Supports batch conversion of multiple integers.
integer-to-ipv4Network
Convert IPv4 addresses to integers. Supports batch conversion of multiple addresses.
ipv4-to-integerMath & Numbers
Convert US liquid gallons to liters with configurable decimal precision
gallon-to-literHealth
Prioritized correction plan for simultaneous Na/K/Mg disorders. Priority: Mg → K → Na. Hypomagnesemia causes refractory K wasting; hyperkalemia is an emergency. Severe hyperkalemia, ODS risk, and interaction warnings included. Derived from Adrogué 2000, Gennari 1998, Agus 1999, Huang 2007, and Whang 1994. Not medical advice.
fluid-electrolyte-correctionHealth
Calculate the hourly maintenance fluid rate using the Holliday-Segar 4-2-1 rule: first 10 kg at 4 mL/kg/h, next 10 kg at 2 mL/kg/h, each kg above 20 at 1 mL/kg/h. Also shows the 24-hour total and the 100/50/20 mL/kg/day daily method for cross-checking. Weight in kg or lb (auto-converted). Derived from Holliday-Segar Pediatrics 1957, MDCalc, and Meyers 2009. Not medical advice.
fluid-maintenance-rateHealth
Calculate the 24-hour crystalloid for moderate-to-severe burns using Parkland (4 mL/kg/%TBSA LR) or Brooke (2 mL/kg/%TBSA LR), accounting for elapsed time since burn. Titrate to urine output. Derived from Baxter 1974, ABA 2008, MDCalc, and ISBI 2016. Not medical advice.
fluid-resuscitation-burnHealth
Compute daily kcal and protein targets for enterally fed adults from weight, kcal/kg and g/kg prescriptions, then translate them into product volume and starting rate. Targets from ASPEN/SCCM, ESPEN. Caveats: actual vs ideal weight, trophic feeding, gastric residual, aspiration precautions. Derived from McClave 2016, Singer/ESPEN 2019, Boullata 2017, MDCalc. Not medical advice.
enteral-nutrition-targetScience & Education
Log Brix / specific-gravity readings over time, plot the decay curve, compute apparent attenuation & projected ABV, and predict the fermentation end-point
fermentation-starter-brix-and-timelapse-trackerHealth
Estimate total body iron stores from serum ferritin. Size-independent rule: stored iron (mg) ≈ ferritin (µg/L) × 10. Body-weight estimate (better across body habitus): stored iron (mg) ≈ ferritin × weight(kg) × 0.0024 (Walters 1973). Adult ferritin reference: men ~30–300 µg/L, women ~15–150 µg/L. Ferritin < 30 µg/L (men) or < 15 µg/L (women) strongly indicates iron deficiency; < 100 µg/L in an inflammatory state does not exclude it. Ferritin > 300 µg/L (men) / > 200 µg/L (women) with TSAT > 45–50% suggests iron overload (hereditary hemochromatosis, dysmetabolic iron overload, iron-loading anemias, transfusions, chronic liver disease); > 1000 µg/L warrants evaluation of hemochromatosis, iron-loading anemias, or hyperferritinemic syndromes. Ferritin is an acute-phase reactant — interpret with TSAT and CRP. Derived from Camaschella 2019, Adams NEJM 2005, and WHO 2020. Not medical advice.
ferritin-store-estimator