Free Reference Charts
Reference charts give you instant access to standardized data without any calculation. Whether you need to check blood pressure ranges, look up shoe sizes, practice guitar chords, study the periodic table, or review poker hand rankings, every chart here is free, accurate, and ready to use on any device.
Health & Medical
19 chartsSystolic and diastolic ranges from normal to hypertensive crisis
Body mass index ranges by height and weight for adults
Blood glucose ranges for fasting and after meals
HbA1c percentage mapped to average blood sugar levels
Normal heart rate zones by age and activity level
Healthy resting heart rate ranges by fitness level
Ideal weight ranges for adults by height
Total cholesterol and LDL ranges by age group
HDL, LDL, and triglyceride level guidelines explained
ABO and Rh blood type compatibility reference guide
Hydration status and health indicators by urine color
Stool form scale for digestive health assessment
What different stool colors indicate about your health
Snellen and LogMAR visual acuity testing reference
Numeric and face-based pain intensity rating scale
Healthy body fat ranges for men and women by age
What mucus color indicates about respiratory health
Pressure points on the foot mapped to body organs
Universal and Palmer dental numbering system guide
Children & Parenting
6 chartsRecommended sleep hours for children at every age
Timeline for primary tooth eruption and natural loss
Acetaminophen dosing by infant weight and age
WHO and CDC height and weight percentile standards
Due date estimation and newborn feeding schedule guide
Recommended gestational weight gain ranges by pre-pregnancy BMI
Medications & Dosage
3 chartsFitness & Sports
4 chartsFood & Nutrition
7 chartsInternal temperature guide for every steak doneness level
Safe internal cooking temperatures for all meats
Scoville heat units for common chili pepper varieties
Dietary fiber content per serving of common foods
Which vegetables and herbs grow well together
GI values and blood sugar impact of everyday foods
Average egg price trends by year and region
Body & Appearance
6 chartsFitzpatrick scale and undertone classification guide
Andre Walker hair type classification from 1A to 4C
Natural and dyed hair color levels and tonal values
Curl type guide from wavy waves to tight coils
Natural eye color genetics and global frequency data
GIA diamond color grades from D colorless to Z
Size & Measurements
13 chartsShoe size conversion between US, UK, and EU systems
Ring circumference and diameter to international ring sizes
Band and cup size guide with measuring instructions
Head circumference to hat size in US and EU
Standard mattress dimensions from twin to California king
Tire width, aspect ratio, and rim size decoder
Drill bit diameter guide for screws and materials
Screw gauge to diameter and length reference chart
Frame size guide by rider height and inseam length
Ski length recommendation by height and skill level
Condom width and length sizing guide by brand
Airline baggage size and weight limits by carrier
Visual height comparison between people and objects
Math & Education
9 chartsTimes tables from 1 to 12 in a printable grid
Roman numeral to Arabic number conversion reference
Ones through trillions place value position guide
Hundred chart and number patterns for early learning
Fraction to decimal and percentage equivalents
Angles, radians, and trig function values at a glance
Uppercase and lowercase letter recognition printable
Know, Want to Know, Learned graphic organizer template
Two-column comparison and contrast organizer template
Science & Chemistry
8 chartsmRNA codon table mapping triplets to amino acids
20 amino acids with structures, codes, and properties
Pauling electronegativity values for periodic table elements
VSEPR molecular shape guide with bond angles
Electron configuration for all periodic table elements
Ion solubility rules for common ionic compounds
pH scale from acidic to basic with common substance examples
All International Phonetic Alphabet symbols for speech sounds
Music & Arts
8 chartsCommon open and barre guitar chord diagrams
Essential ukulele chord shapes for beginner players
Major, minor, and 7th chord shapes on piano keys
Note fingering diagrams for every clarinet note
Fingering positions for all standard flute notes
Valve combinations for trumpet notes and scales
Alto and tenor saxophone fingering quick reference
Primary, secondary, and tertiary color relationships
Languages & Codes
8 chartsAll 46 hiragana characters with romaji pronunciation
All 46 katakana characters with romaji pronunciation
International Morse code for letters and numbers
NATO alphabet from Alpha to Zulu with military usage
Present tense verb conjugation for regular Spanish verbs
24-hour military time to standard 12-hour time conversion
Time zone differences and UTC offset reference guide
Common unit conversion factors and formulas at a glance
Finance & Money
7 chartsHistorical mortgage interest rate trends by year
FICO score ranges and credit rating category breakdown
Active duty military pay grades and monthly rates
VA disability compensation rates by percentage rating
Full retirement age by year of birth reference
Jackpot payout options comparing lump sum and annuity
Required minimum distribution factor table by age
Games & Entertainment
4 chartsAstrology & Spirituality
4 chartsBusiness & Planning
5 chartsProject timeline bar chart for task scheduling
80/20 rule bar and line chart for root cause analysis
Sequential positive and negative value flow chart
Price and quantity equilibrium economics diagram
News source political lean and reliability ratings
Technical & Engineering
4 chartsBody Art & Pets
3 chartsWhat Is a Reference Chart?
A reference chart is a structured document that organizes standardized data into a scannable format so you can retrieve a value instantly without performing any calculation. Unlike a calculator that takes your inputs and applies a formula, a chart presents fixed reference data established by medical organizations, scientific bodies, standards agencies, or industry groups. You look up your value — a height, a note, a blood pressure reading, a ring measurement — and find the corresponding category, name, or range right on the page.
Health Charts
Health charts help you interpret medical readings without specialized training. The blood pressure chart shows systolic and diastolic ranges from optimal through hypertensive crisis so you can understand where any reading falls. The BMI chart maps height and weight combinations to underweight, normal, overweight, and obese categories. The A1C chart translates hemoglobin A1C percentages into estimated average glucose values used by clinicians to monitor diabetes management. The cholesterol levels chart shows healthy and high-risk ranges for LDL, HDL, and total cholesterol in one place.
Other essential health charts include the heart rate chart for understanding target training zones, the urine color chart for hydration awareness, the Bristol stool chart used clinically for digestive health discussions, the stool color chart for identifying what poop colour changes may indicate, and the pain scale chart used in clinical settings to communicate pain intensity.
Size and Measurement Charts
Size charts eliminate the guesswork when buying clothing, footwear, jewelry, or equipment online. The shoe size chart converts between US, UK, and EU sizing so you can order confidently from international retailers. The ring size chart maps circumference measurements in millimeters to standard ring sizes across different regional systems. The bra size chart guides you through band and cup measurement to find the right fit. For outdoor and sports equipment, the bike size chart and ski length chart help match frame and ski dimensions to your height and riding style.
Educational and Math Charts
Educational charts are used in classrooms and at home to support learning across subjects. The multiplication chart displays times tables in a grid for quick mental math reference. The fraction chart shows common fractions alongside their decimal and percentage equivalents. The unit circle chart is essential for trigonometry students memorizing sine, cosine, and tangent values at key angles. In science, the codon chart maps mRNA triplets to the amino acids they encode, while the pH chart places familiar substances on the acid-to-base scale.
Music, Language, and Code Charts
Musicians rely on fingering and chord charts to learn new instruments. The guitar chord chart shows essential open and barre chord shapes, while the piano chord chart maps major and minor chord positions across the keyboard. Language learners use the hiragana chart and katakana chart as daily reference when studying Japanese. The Morse code chart and NATO phonetic alphabet chart serve communication and aviation contexts.
Finance Charts
Finance charts provide quick clarity on personal and government financial data. The mortgage rates chart covers 30-year, 15-year, and adjustable-rate mortgage trends with a historical rate timeline from 2000 to 2026. The credit score chart shows where your FICO score falls across poor, fair, good, and exceptional tiers. The military pay chart lists active duty base pay by grade and years of service. The RMD chart provides the IRS uniform lifetime table factors needed to calculate annual required minimum distributions from retirement accounts.
Frequently Asked Questions
What is a reference chart?
A reference chart is a structured table, grid, or visual that organizes standardized data so you can look up a value quickly without performing a calculation. Charts present fixed information such as blood pressure ranges, shoe size conversions, musical fingering positions, or cooking temperatures in a scannable format.
Are these charts free to use?
Yes. Every chart on this site is completely free with no account, no subscription, and no hidden fees. Charts are available directly in your browser and are optimized for both desktop and mobile viewing.
How accurate is the data in these charts?
Chart data is sourced from established medical organizations, scientific bodies, industry standards, and government agencies. For health-related charts such as blood pressure, BMI, or medication dosage, always consult a qualified healthcare professional before making decisions.
Can I print these charts?
Yes. All charts are designed to be printer-friendly. Use your browser's print function (Ctrl+P or Cmd+P) to print any chart directly from the page.
What categories of charts are available?
The collection covers health and medical charts, children and parenting charts, fitness and sports charts, food and nutrition charts, size and measurement charts, math and education charts, science and chemistry charts, music charts, language charts, finance charts, and more.
How often are new charts added?
New charts are added regularly. This page updates automatically to include new charts as they are published, so you will always find the most current collection here.