DATABASES | RESEARCH | REFERENCE GUIDES 

Journalist’s Resource: Math Basics for Journalists: Working with Averages and Percentages

Journalist’s Resource: Reporting on Percent Change vs. Percentage Point Change
Four tips to avoid math mistakes

Journalist’s Resource: Tips for Journalists Working With Math

Journalist’s Resource: Statistics for Journalists Tipsheet

Journalist’s Resource: What Journalists Need to Know About Standard Deviation

Aneki.com
Rankings and statistics on hundreds of topics and countries. The world’s cleanest country, the country with the most mobile phones per capita, etc.

Infographic: Percent Change Versus Percentage-Point Change

Journalist’s Numbers Guide

Robert Niles: Statistics Writers Should Know
An excellent reference primer from Robert Niles on stats for journalists.Start here with several math tutorials!

National Center for Business Journalism: Newsroom Math Crib Sheet
Great math shortcuts and formulas from Steve Doig.

GIJN: 5 Things Journalists Need to Know About Statistical Significance
Denise Ordway offers tips to avoid some of the most common errors related to statistical significance in academic studies.

Poynter: How to Make Sense of Numbers in Science and Health Reports

GIJN: 5 Things Journalists Need to Know About Statistical Significance
Denise Ordway offers tips to avoid some of the most common errors related to statistical significance in academic studies.

Research Statistical Terms Primer for Journalists
Great primer from Harvard.

Making Numbers Count
Slides form NICAR 22 presentation on how to write with data, by Holly Hacker and Jen LaFleur.

Investopedia: How the Dow Jones Is Calculated

GIJN: Interpreting Data – How to Read the Numbers

Math Mistakes
Common errors by reporters, advertisers, politicians and activists.

Eric Weisstein’s World of Mathematics

Stats.org
Explores how journalists can use statistics.

WebMath
More than 1,000 pre-solved problems, many with free answers, for geometry, trig, algebra, etc. A very handy site for journalists.

Bureau of Labor Statistics: Consumer Price Index Database
Select an item (gas, food, etc.) and track price increases nationally over time. Great quick reference for stories.

STEM, Research and Writing Resources for Journalists
Math, science, research, writing and other tools reporters will find handy.

Encyclopedia of Mathematics
More than 8,000 entries.

Institute for Analytic Journalism

Nieman Lab: Can We Make it Easier for Readers to Digest Numbers?

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Calculators, Converters and Other Tools

Bureau of Labor Statistics: Inflation Calculator

West Egg Inflation Calculator
Calculate increases in prices over the years.

Bankrate.com Gas Price Calculators

The Measure of Things
Great for when you need to contextualize numbers. E.g crowd sizes, distances, mass etc.

T. Row Price: Retirement Calculator

Omni Calculator
Omni Calculator created a collection of tools specifically for journalists. It helps with everyday computations , such as percentages for poll results; contextualizing numbers so the audience inherently understands them, like our weird and wonderful units converter; and other tools, like the time zone calculator for organizing interviews across the world.

Zillow: Mortgage Calculator
Combines comprehensive outputs, showing a mortgage payment in full, with a smooth interface and attractive usability.

Percentage Calculator
Using a simple and clean interface, this site lets you calculate percentages three ways: – What is x% of a number? – x is what % of y? – What is the % change between x and y?

Good Calculators
Provides a variety of online calculators, such as math and statistics, engineering and conversion calculators.

Online Conversion Tool

Calculate Me

Distance Finder Calculator

Universal Currency Converter

Convert-Me.com
“Interactive calculators for many measurement systems both commonly used like metric and U.S. Avoirdupois and quite exotic like Ancient Greek and Roman.”

BankRate: Interest Calculator
Track the difference a small percentage change in interest can make on an investment over time.

PhotoMath
Use this iPhone app to point at a written or typed math problem and it will scan and solve it using AI software.

TravelMath.com
Determine distances, flight times, etc. You also can do this by typing into Google the flight time/distance, etc.