Illustrative UV index, sunburn band, and vitamin D discussion from latitude, time, cloud, altitude, job type, and Fitzpatrick skin type. Not medical advice.

HealthSunNASA

Ionizing Radiation Dose Estimator

Rough effective dose from air travel, imaging, space, and occupational inputs. UNSCEAR / NASA orders of magnitude; not dosimetry.

HealthNASARadiation

Alcohol Units & Liver Load Estimator

UK-style units per week, illustrative risk band, and toy liver stress score from age, weight, sex, and drinking pattern. Not clinical guidance.

HealthWHO

Cancer Relative Risk (Multi-Factor)

Pack-years and coarse multipliers for smoking, second-hand smoke, pollution, radiation, and family history. Shows relative increase only — never a cancer %.

HealthCDCWHO

Physical Activity & Lifestyle Estimator

PAL from desk vs labor job, optional steps, MET-based exercise, Mifflin–St Jeor TDEE, and WHO-style minutes/week suggestion.

HealthWHOCDC

Optical Link Budget Calculator

Calculate fibre link loss from distance, attenuation, splices, and connectors; get received power and PASS/FAIL margin.

OpticalFTTHNetworking

Optical Power Converter (dBm, mW, uW)

Convert optical power between dBm, mW, and uW with quick GPON/EPON presets and practical receive-level context.

OpticalConverter

Fibre Attenuation Calculator

Estimate fibre loss over distance for 1310 nm and 1550 nm with SMF and MMF presets and ITU-style reference values.

OpticalFiber

FTTH Splitter Planning Tool (GPON/EPON)

Model FTTH splitter scenarios for 1:8, 1:16, 1:32, 1:64 and estimate ONT receive power and pass/fail feasibility.

FTTHGPONEPON

Fibre Core Capacity Planner

Plan fibre core count and OLT ports from user volume, per-user bandwidth, split ratio, and future growth.

FTTHCapacityPlanning

Optical Network Topology Cost Estimator

Estimate network fibre length and rough CAPEX from area size, user density, drop assumptions, and deployment cost.

OpticalCostPlanning

Chromatic Dispersion Calculator

Calculate pulse broadening from wavelength, fibre type, spectral width, and distance for optical transport planning.

OpticalDWDM

Optical SNR / OSNR Calculator

Compute OSNR from signal and noise power levels for DWDM-style optical channel quality checks.

OpticalDWDM

Wavelength to Frequency Converter

Convert wavelength in nm and frequency in THz and apply common DWDM channel spacing presets.

OpticalDWDMConverter

Fibre Bend Radius Calculator

Estimate recommended fibre bend radius based on cable type, diameter, and installation versus long-term deployment mode.

OpticalField Tools

Temperature vs Loss Estimator

Estimate additional optical link loss caused by elevated outdoor temperatures using a configurable dB/km/C coefficient.

OpticalField Tools

Connector Compatibility Tool

Check compatibility across common optical connector types and polish styles including SC/APC, SC/UPC, LC, and FC.

OpticalField Tools

SFP Compatibility Checker

Check SFP compatibility by switch/router brand, model, and speed. Includes third-party support and vendor-lock warnings.

SFPDatacenterProcurement

SFP Distance & Power Budget Calculator

Estimate whether an SFP link will work using SFP type, fibre type, distance, and connector/splice losses with margin status.

SFPOpticalPlanning

SFP Type Identifier Tool

Beginner-friendly selector that suggests SFP type from wavelength, distance requirement, and speed (1G/10G/25G).

SFPBeginnerBuying Guide

SFP ↔ QSFP ↔ QSFP28 Converter Tool

Convert and visualize port/lane breakouts like 1x QSFP28 (100G) to 4x SFP28 (25G) for capacity planning.

SFPQSFPDatacenter

Wavelength & Fibre Matching Tool

Check whether selected SFP wavelength and fibre type are compatible and view expected loss profile warnings.

SFPOpticalField Tools

SFP Power Level Analyzer

Analyze measured RX power and classify as too weak, optimal, or too strong with overload risk context.

SFPDiagnostics

SFP Diagnostic Decoder

Paste switch optic diagnostics and get interpreted health status, warnings, and suggested fixes.

SFPNOCDiagnostics

SFP Vendor Code / EEPROM Decoder

Decode vendor and capability details from SFP EEPROM-like text for lab testing, repair, and validation workflows.

SFPLabAdvanced

Which SFP Do I Need? Smart Wizard

Answer distance, fibre type, speed, and budget to get exact SFP recommendations, alternatives, and cost range.

SFPWizardBuying Guide

DNA → RNA → Protein Translator

Translate DNA sequences into mRNA and amino-acid chains with frame shift options and codon highlighting.

BiotechGeneticsEducation

Reverse Complement Generator

Generate reverse complement DNA strand and view sequence length, GC percentage, and palindrome detection.

BiotechGenetics

GC Content Calculator

Calculate GC percentage and estimate DNA melting temperature (Tm) for PCR and stability checks.

BiotechPCR

Codon Usage Analyzer

Analyze codon usage and compare preference score against E. coli, S. cerevisiae, and human expression contexts.

BiotechGene Expression

Bacterial Growth Calculator

Estimate final bacterial population from initial count, doubling time, and duration with growth curve points.

MicrobiologyLab

CFU Calculator

Compute colony forming units per ml from plate counts, dilution factor, and plated volume.

MicrobiologyLab

Antibiotic MIC Estimator

Estimate effective concentration from MIC and safety multiplier. Educational use only, not clinical dosing advice.

MicrobiologyEducational

PCR Calculator

Calculate reagent volumes for PCR setup from stock concentrations, target concentrations, and reaction volume.

BiotechPCRLab

Serial Dilution Calculator

Generate step-by-step serial dilution concentration table from starting concentration and dilution factor.

BiotechLab

Molarity & Solution Prep Calculator

Convert mg to moles, moles to mg, and molarity to volume for chemistry and biotech solution prep workflows.

BiotechChemistry

Punnett Square Generator

Build a monohybrid Punnett square and compute offspring genotype probabilities with phenotype-style dominant/recessive ratio.

GeneticsEducation

Hardy-Weinberg Calculator

Calculate expected genotype frequencies under Hardy-Weinberg assumptions from allele frequency input.

GeneticsPopulation

Sequence Alignment Tool (Basic)

Compare two DNA sequences and compute matches, mismatches, and identity percentage.

BioinformaticsDNA

Restriction Enzyme Finder

Find restriction enzyme recognition sites in DNA with quick presets for common enzymes.

BioinformaticsLab

ORF Finder

Identify open reading frames from DNA sequence with reading frame and coding-length details.

BioinformaticsGenomics

Viral Load Growth Estimator

Estimate viral load progression with an educational exponential model from initial load and growth rate.

ClinicalEducational

Mutation Impact Predictor (Basic)

Estimate mutation difference percentage between reference and observed sequence with simple impact bands.

ClinicalGenetics

Incubation Period Estimator

Estimate expected incubation midpoint from minimum and maximum day range for educational planning.

ClinicalEducational

Clinical Trial Sample Size Calculator

Estimate required per-arm sample size from alpha, power, effect size, and variance for clinical trial planning.

Clinical ResearchBiostatisticsPharma

Clinical Randomization Generator

Generate reproducible randomization lists with simple or block randomization and CSV export-ready output.

Clinical OperationsCRO

Study Design Selector

Get a recommended study design based on study type, endpoint, and target population.

Clinical ResearchProtocol

Confidence Interval Calculator (Clinical)

Calculate 95% confidence interval from mean, standard deviation, and sample size.

BiostatisticsClinical

p-value Calculator (Clinical)

Compute p-values with z-test or chi-square test and get significance interpretation.

BiostatisticsClinical

Kaplan-Meier Survival Curve Generator

Generate interval-wise Kaplan-Meier survival estimates from at-risk, event, and censoring inputs.

BiostatisticsOncology

PK Half-Life Calculator

Estimate elimination half-life from concentration measurements and elapsed time for PK interpretation.

PharmacokineticsPharma

Weight-Based Dose Calculator

Calculate mg dose and administration volume from body weight, mg/kg target, and concentration.

PharmacologyClinical

AUC Calculator (PK)

Estimate area under the concentration-time curve (AUC) with trapezoidal method.

PharmacokineticsCRO

Visit Schedule Planner

Build a visit schedule timeline from total study duration and visit interval settings.

Clinical OperationsTrial Management

Patient Recruitment Estimator

Estimate recruitment time from incidence pool, site capacity, and number of active sites.

Clinical OperationsCRO

Dropout Rate Impact Calculator

Estimate effective sample size and power impact from expected dropout rates.

Clinical ResearchBiostatistics

Batch Size Scaling Calculator

Scale formula component quantities from lab batch size to pilot or production size.

Pharma ManufacturingProcess

Stability Study Planner

Plan stability study conditions and checkpoints for common ICH climatic zones.

RegulatoryPharma Manufacturing

Shelf-Life Estimator

Estimate shelf-life based on first-order degradation assumptions across storage temperatures.

Pharma ManufacturingStability