Unit Converter
FAQ
RL Hudson cannot and does not warrant that any functions contained in the Unit Converter will meet your requirements, or that its operations will be error free. The entire risk as to the Unit converter performance or quality, or both, is solely with the user and not RL Hudson. You assume responsibility for the selection of the component to achieve your intended results, and for the installation, use, and results obtained from the Unit Converter.
RL Hudson makes no warranty, either implied or expressed, including without limitation any warranty with respect to the Unit Converter documented here, its quality, performance, or fitness for a particular purpose. In no event shall RL Hudson be liable to you for damages, whether direct or indirect, incidental, special, or consequential arising out the use of or any defect in the Unit Converter, even if RL Hudson has been advised of the possibility of such damages, or for any claim by any other party.
All other warranties of any kind, either express or implied, including but not limited to the implied warranties of merchantability and fitness for a particular purpose, are expressly excluded.
Our converters support expressions such as the input string "1+2*(3+5)" involving not only basic mathematical operations, but also advanced operations such as sqrt, pow, sin, cos, abs, etc. So our calculators can solve not only unit conversions but math problems involving basic arithmetic and more complicated math. Please refer to the general help section for a complete reference of supported functions.
Also, our converters seem to be the only ones (to the best of our knowledge) which feature custom handling of all math-related operations involving conversions. The visible result is that, for example, you'll never see numbers like 4.999999 instead of 5 or 4.0000001 instead of 4 when 5 and 4 are the correct conversion results.
The inputted strings are automatically re-evaluated with every new symbol you type, so there is no need for a separate "Calculate" type button thus saving time.
Short Answer: The "e" stands for exponent. So 4.12e+04 is a convenient way of saying 4.12*104, or 4120000. If your result was, for example, 3e-08, then the answer would have been 3*10-8, or 0.00000003
Long Answer: For your convenience, very large and very small numbers are automatically converted to so-called "scientific notation" (also known as standard index notation or exponential notation). For example, the Earth's mass in scientific notation, will be written as 5.9736e+21, converted from the regular 5973600000000000000000000 number and proton mass as 1.6726e-27, converted from the regular 0.0000000000000000000000000016726 number.
To convert from scientific notation to a regular number, shift the decimal point in the coefficient to the right if the number after exponent (e) if it is positive and to the left if it is negative. The number in the exponent tells you the number of positions to shift the decimal point. For example, when 2.2e+4 is converted to a regular number, the decimal point is shifted four positions to the right because the exponent is 4. Thus, 2.2e+4 goes to 22000.
Our converters support the use of mathematical expressions as well as simple values as input data for conversion. The following is a lists of supported basic operators, advanced operators, and constants.
The following table lists basic functions built into the converters:
| Operator | Meaning | Example |
| + | addition | 12+34 |
| - | subtraction | 5.6-7.8 |
| * | multiplication | 5.5*110 |
| / | division | 128/5 |
| % | modulo (finds the remainder after division) | 14%2 |
| () | Forces the expression within the parentheses to be calculated first, overriding the normal order of operations | 2*(3+4) |
The following table lists advanced functions and constants built into the converters:
| Operator | Meaning | Example |
| pow | exponentiation (raise to a power of) | pow(2,8) |
| sqrt | square root | sqrt(16) |
| sin, cos, tan | trigonometric functions (numbers are assumed to be radians) | cos(pi/3) |
| asin, acos, atan, atan2 | inverse trigonometric functions | acos(.5) |
| log | logarithm base e | log(16) |
| exp | e raised to a power | exp(4.1) |
| abs | the absolute value | abs(-5) |
| round | round to the nearest integer | round(1.45) |
| ceil | the smallest integer greater than or equal to | ceil(4.95) |
| floor | the greatest integer less than or equal to | floor(4.05) |
| max | the greater number | max(0,1,2,3,4) |
| min | the lesser number | min(5,6,7,8,9) |
| Constant | Meaning | Example |
| e | mathematical constant e, the base of natural logarithms, approximately 2.718 | e |
| pi | the ratio of the circumference of a circle to its diameter, approximately 3.141592653589793 | pi |
| ln2 | the natural logarithm of 2, approximately 0.693 | ln2 |
| ln10 | the natural logarithm of 10, approximately 2.302 | ln10 |
| log2e | the base-2 logarithm of e, approximately 1.442 | log2e |
| log10e | the base-10 logarithm of e, approximately 0.434 | log10e |
| sqrt1_2 | the square root of 0.5, or one divided by the square root of 2, approximately 0.707 | sqrt1_2 |
| sqrt2 | the square root of 2 | sqrt2 |
