RS

Rahul Sharma

Mathematics, statistics and data tools · Berekening.be

Rahul is an applied mathematician who drifted into engineering and never entirely left either. He covers the parts of the site that are pure calculation — geometry, percentages, statistics, unit conversion, dates, the science calculators and the developer tools — and he is the second pair of eyes on formulas elsewhere.

His concern is the arithmetic being right for the right reason. Unit conversion is where that shows: a factor is easy, but rounding at the wrong step, or converting a temperature as if it were a length, produces answers that look plausible and are not. He would rather a page showed the formula than asked to be trusted.

He also writes the statistics pages, mostly to argue with the way they are usually taught — a significance test answers a narrower question than most people think they are asking, and saying so is part of the calculation.

135
Written
171
Reviewed

Written by Rahul Sharma

Showing 60 of 135.

0.1 N HCl
Chemistry
1/3 of a number
Arithmetic
12 weeks from today
Dates
180 days from a date
Dates
20% of a number
Percentages
26 weeks from a date
Dates
28 days from today
Dates
3 months from today
Dates
30% of a number
Percentages
48 hours from now
Dates
5 percent of a number
Percentages
5 years from a date
Dates
5% of a number
Arithmetic
6 months from today
Dates
60 days from today
Dates
72 hours from now
Dates
8 weeks from today
Dates
84 days from today
Dates
Confidence interval
Statistics
95th percentile
Statistics
Acceleration
Physics
age from date of birth
Dates
Algebra
Algebra
Carbon footprint
Environmental
cm to m
Length & Distance
Chemistry
Chemistry
Chi square
Statistics
Circle circumference
Geometry
Coefficient of variation
Statistics
Confidence level
Statistics
Converters
Converters
Correlation
Statistics
Covariance
Statistics
cuboid volume
Area & Volume
Cylinder volume
Geometry
Dates
Dates
days between two dates
Dates
days between two dates
Dates
Density
Physics
Developer
Developer
Dew point
Weather
Difference between two numbers
Arithmetic
Dilution
Chemistry
distance between coordinates
Distance & Speed
Distance
Distance & Speed
Education
Education
Engagement rate
Statistics
Environmental
Environmental
Triangle area (measured base/height)
Geometry
Force
Physics
Convert
Developer
Generate
Developer
Geometry
Geometry
GPA
Education
Hash generator
Developer
Heat index
Weather
HMAC generator
Developer
HTML formatter
Developer
Hypotenuse
Geometry
Interquartile range
Statistics

Reviewed by Rahul Sharma

Showing 60 of 171.

1 rep max (bench)
Sport
Anion gap
Health
AUD to GBP
Currency
AUD to CNY
Currency
AUD to DKK
Currency
AUD to EUR
Currency
AUD to JPY
Currency
AUD to PLN
Currency
AUD to SGD
Currency
AUD to ZAR
Currency
AUD to TRY
Currency
BMI
Health
BMI
Health
BMI (NHS)
Health
BMR
Health
Body
Health
Body fat percentage
Health
Body surface area
Health
BRL to GBP
Currency
BRL to CNY
Currency
BRL to DKK
Currency
BRL to EUR
Currency
BRL to JPY
Currency
BRL to PLN
Currency
BRL to SGD
Currency
BRL to ZAR
Currency
BRL to TRY
Currency
GBP to NZD
Currency
GBP to SEK
Currency
GBP to CHF
Currency
GBP to USD
Currency
Calorie deficit
Health
Calorie deficit
Health
Calories to lose weight
Health
CAD to GBP
Currency
CAD to CNY
Currency
CAD to DKK
Currency
CAD to EUR
Currency
CAD to JPY
Currency
CAD to PLN
Currency
CAD to SGD
Currency
CAD to ZAR
Currency
CAD to TRY
Currency
Celsius to Fahrenheit
Weather
CNY to CAD
Currency
CNY to INR
Currency
CNY to MXN
Currency
CNY to NOK
Currency
Creatinine clearance
Health
Cycling calories
Sport
DKK to AUD
Currency
DKK to BRL
Currency
DKK to HKD
Currency
eGFR
Health
EUR to AUD
Currency
EUR to BRL
Currency
EUR to HKD
Currency
Fat free mass
Health
Feels-like temperature
Weather
Fibre intake
Health

All contributors