# Find log and antilog by using simple calculator...

Tehsinkhan Pathan (CA CMA DISA(ICAI) B.COM)   (3951 Points)

01 June 2011

HERE , I AM PROVIDING THE METHOD BY WHICH YOU CAN FIND LOG AND ANTILOG BY USING SIMPLE CALCULATOR AND THERE IS NO NEED OF TABLES..................

Tehsinkhan Pathan (CA CMA DISA(ICAI) B.COM)   (3951 Points)
Replied 01 June 2011

FOR , TO FIND LOG

HOW TO FIND LOG BY USING SIMPLE CALCULATOR??????????

1.    WRITE 2.7183

2.    TAP ‘ ‘ (i.e. Square Root) 12 times

3.    DEDUCT ‘ 1 ‘                          (= 0.00024417206)

4.    PRESS ‘ M+ ‘ KEY

5.    WRITE THE NO. OF WHICH ,YOU WANT TO FIND LOG

(E.G. LOG 5 THEN WRITE 5)

6. TAP ‘ ‘ (i.e. Square Root) 12 times

7. DEDUCT ‘ 1 ‘

8. PRESS ‘ ÷

9. PRESS ‘ MRC’

10. PRESS ‘ = ‘ (ANSWER WILL BE IN BASE e)

IF TO FIND IN THE BASE OF 10 THEN :-

11. PRESS ‘ X ‘ (i.e. MULTIPLY BY) AND WRITE 0.4343

12. PRESS ‘ = ‘ (ANSWER WILL BE IN BASE 10)

NOTE :- ABOVE 1ST  THEREE STEPS WILL BE COMMON SO IT IS BETTER TO

REMEMBER THE VALUE ‘ 0.00024417206 ‘

FOR EXAMPLE :- LOG 5 = 0.6990

NOW WE WANT TO FIND LOG OF 5 :-

1.    WRITE 0.00024417206

2.    TAP ‘ M+ ‘ KEY

3.    WRITE THE NO. YOU WANT TO FIND THE LOG i.e. 5

4.    TAP ‘ ‘ (i.e. square root) 12 TIMES  (= 1.00039300638)

5.    DEDUCT ‘ 1 ‘  (= 0.00039300638)

6.    TAP ‘ ÷

7.    TAP ‘ MRC ’

8.    TAP ‘ = ’ (1.6095 – ANSWER IN BASE e )

9.    TAP ‘X’ (i.e. MULTIPLY) BY 0.4343 THEN TAP ‘=’

(0.6990 – ANSWER IN BASE 10)

NOTE FOR ABOVE EXAMPLE :-

WE CAN DIRECTLY DIVIDE BY 0.00024417206 IN STEP – 7 INSTEAD

OF USING  ‘MRC’ BUTTON , IN SUCH CASE , THERE IS NO NEED OF

STEP – 1 & 2. YOU CAN DIRECTLY START FROM STEP -3

Attached File : 461361 729372 how to find log by using simple calculator.doc downloaded: 3085 times

Tehsinkhan Pathan (CA CMA DISA(ICAI) B.COM)   (3951 Points)
Replied 01 June 2011

FOR, TO FIND ANTILOG .....

**HOW TO FIND ANTILOG BY USING SIMPLE

CALCULATOR?

STEPS TO BE FOLLOWED :-

1.   WRITE THE NO.

2.   TAP ÷ (i.e. divide ) by 0.4343 & = (equal to)

3.   TAP X (i.e. Multiply ) by 0.00024417206

5.   TAP ‘X & = ‘ (MULTIPLY & EQUAL TO) 12 TIMES SIMULTANEOUSLY.

FOR EXAMPLE :- LOG 5 = 0.6990

NOW WE WANT TO FIND ANTILOG OF 0.6990 THEN

1.   0.6990

2.   (0.6990 ÷ 0.4343) = 1.60948653004

3.   (1.60948653004 X 0.00024417206) = 0.00039299164

4.    (0.00039299164 + 1) = 1.00039299164

5.    (1.00039299164 X THEN =) FOR 12 TIMES

= 4.9997 ~ 5 (i.e. log 5)

Attached File : 461361 729376 how to find antilog by using simple calculator.doc downloaded: 2574 times

rahul (Chartered Accountant and CS Prof.)   (5470 Points)
Replied 01 June 2011

Thanks For sharing sir ?

I will try

CA ADITYA SHARMA (CA IN PRACTICE ) (16719 Points)
Replied 01 June 2011

ITS AMAZING

Rishi (Student of Std. 11th Science)   (26 Points)
Replied 29 March 2012

To find log following steps:

1. Enter the value for which you have to find log
2. Press sqrt button 15 times
3. Subtract 1 from that no.
4. Divide it by 0.00007027178
5. Press equals to button.

Example:

1. To find log of 2
2. Press 2 in calculator
3. Press sqrt button 15times (Ans: 1.00002115339)
4. Subtract 1from that (Ans: 1.00002115339 - 1 = 0.00002115339)
5. Divide by 0.00007027178 (Ans: 0.00002115339 / 0.00007027178 = 0.30102254418)
6. Answer is 0.3010 (upto 4 digit)

Vigneshwaran Namachivayam (Industrial Trainee) (26 Points)
Replied 09 March 2015

How to solve this in normal calculator guys.? (2.075)^¼

Satyam Sharma (16 Points)
Replied 20 March 2016

In simple calci we found log on base 10 from simple trick...

1) press no. whoes log you want to find   (e.g. log2)

2) press 19 times underroot button    (1.00000132206)

3) subtract 1      (1.00000132206-1 = 0.00000132206)

4) multiply by 227695  (0.00000132206 * 227695 = 0.3010264517

Shefali Sachdeva (2 Points)
Replied 17 February 2017

This answer was helpful...I need to find antilog by d same simple way...please tell me the same

M&#652;&#331;&#617;s&#668; S&#617;&#331;&#667;&#668; (2 Points)
Replied 04 March 2017

TO FIND LOG BY USING CALCULATOR

1.) write No.

2) 19 times root

3) multiply by 227695

4) subtract 227695

5) final result is required LOG

so simple !!

Anmol Davesar (Chartered Accountant) (818 Points)
Replied 13 April 2017

Here is more simple way ANTILOG write number Divide by [ 227695 ] you have to remember this number Then plus +1 Then multiply = button 19 times thats it For LOG Square root 15times Then subtract 1 Anf then divide by .000070271 Thats it hope it helps

harsh gupta (2 Points)
Replied 22 September 2018

Sir can give me the answer of this question Find antilog(0.9116) In step by step form

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